chore(license): switch to AGPLv3 (#290)

CONTRIBUTING.md

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+## Contribute Code
+
+You are welcome to contribute to Fluence!
+
+Things you need to know:
+
+1.  You need to **agree to the [Contributor License Agreement](https://gist.github.com/fluencelabs-org/3f4cbb3cc14c1c0fb9ad99d8f7316ed7) (CLA)**. This is a common practice in all major Open Source projects. At the current moment, we are unable to accept contributions made on behalf of a company. Only individual contributions will be accepted.
+
+2.  **Not all proposed contributions can be accepted**. Some features may, e.g., just fit a third-party add-on better. The contribution must fit the overall direction of Fluence and really improve it. The more effort you invest, the better you should clarify in advance whether the contribution fits: the best way would be to just open an issue to discuss the contribution you plan to make.
+
+### Contributor License Agreement
+
+When you contribute, you have to be aware that your contribution is covered by [GNU Affero General Public License version 3](./LICENSE), but might relicensed under few other software licenses mentioned in the **Contributor License Agreement**.  In particular, you need to agree to the Contributor License Agreement. If you agree to its content, you simply have to click on the link posted by the CLA assistant as a comment to the pull request. Click it to check the CLA, then accept it on the following screen if you agree to it. The CLA assistant will save this decision for upcoming contributions and will notify you if there is any change to the CLA in the meantime.

FluenceCLA.md

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+Thank you for your interest in Fluence Labs projects. 
+
+In order to clarify the intellectual property license
+granted with Contributions from any person or entity, Fluence Labs
+must have a Contributor License Agreement ("CLA") on file that has
+been signed by each Contributor, indicating agreement to the license
+terms below. This license is for your protection as a Contributor as
+well as the protection of Fluence Labs and its users; it does not
+change your rights to use your own Contributions for any other purpose.
+This contribution license is based on the GNU Affero General Public License version 3.
+
+Please read this document carefully before signing and keep a copy
+for your records.
+
+You accept and agree to the following terms and conditions for Your
+present and future Contributions submitted to Fluence Labs. Except
+for the license granted herein to Fluence Labs and recipients of
+software distributed by Fluence Labs, You reserve all right, title,
+and interest in and to Your Contributions.
+
+1. Definitions.
+ "You" (or "Your") shall mean the copyright owner or legal entity
+ authorized by the copyright owner that is making this Agreement
+ with Fluence Labs. For legal entities, the entity making a
+ Contribution and all other entities that control, are controlled
+ by, or are under common control with that entity are considered to
+ be a single Contributor. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+ "Contribution" shall mean any original work of authorship,
+ including any modifications or additions to an existing work, that
+ is intentionally submitted by You to Fluence Labs for inclusion
+ in, or documentation of, any of the products owned or managed by
+ Fluence Labs (the "Work"). For the purposes of this definition,
+ "submitted" means any form of electronic, verbal, or written
+ communication sent to Fluence Labs or its representatives,
+ including but not limited to communication on electronic mailing
+ lists, source code control systems, and issue tracking systems that
+ are managed by, or on behalf of, Fluence Labs for the purpose of
+ discussing and improving the Work, but excluding communication that
+ is conspicuously marked or otherwise designated in writing by You
+ as "Not a Contribution."
+
+2. Grant of Copyright License. Subject to the terms and conditions of
+ this Agreement, You hereby grant to Fluence Labs and to
+ recipients of software distributed by Fluence Labs a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare derivative works of,
+ publicly display, publicly perform, sublicense, and distribute Your
+ Contributions and such derivative works.
+
+3. Grant of Patent License. Subject to the terms and conditions of
+ this Agreement, You hereby grant to Fluence Labs and to
+ recipients of software distributed by Fluence Labs a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have
+ made, use, offer to sell, sell, import, and otherwise transfer the
+ Work, where such license applies only to those patent claims
+ licensable by You that are necessarily infringed by Your
+ Contribution(s) alone or by combination of Your Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If any
+ entity institutes patent litigation against You or any other entity
+ (including a cross-claim or counterclaim in a lawsuit) alleging
+ that your Contribution, or the Work to which you have contributed,
+ constitutes direct or contributory patent infringement, then any
+ patent licenses granted to that entity under this Agreement for
+ that Contribution or Work shall terminate as of the date such
+ litigation is filed.
+
+4. You represent that you are legally entitled to grant the above
+ license. If your employer(s) has rights to intellectual property
+ that you create that includes your Contributions, you represent
+ that you have received permission to make Contributions on behalf
+ of that employer, that your employer has waived such rights for
+ your Contributions to Fluence Labs, or that your employer has
+ executed a separate Corporate CLA with Fluence Labs.
+
+5. You represent that each of Your Contributions is Your original
+ creation (see section 7 for submissions on behalf of others). You
+ represent that Your Contribution submissions include complete
+ details of any third-party license or other restriction (including,
+ but not limited to, related patents and trademarks) of which you
+ are personally aware and which are associated with any part of Your
+ Contributions.
+
+6. You are not expected to provide support for Your Contributions,
+ except to the extent You desire to provide support. You may provide
+ support for free, for a fee, or not at all. Unless required by
+ applicable law or agreed to in writing, You provide Your
+ Contributions on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
+ OF ANY KIND, either express or implied, including, without
+ limitation, any warranties or conditions of TITLE, NON
+INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE.
+
+7. Should You wish to submit work that is not Your original creation,
+ You may submit it to Fluence Labs separately from any
+ Contribution, identifying the complete details of its source and of
+ any license or other restriction (including, but not limited to,
+ related patents, trademarks, and license agreements) of which you
+ are personally aware, and conspicuously marking the work as
+ "Submitted on behalf of a third-party: [named here]".
+
+8. You agree to notify Fluence Labs of any facts or circumstances of
+ which you become aware that would make these representations
+ inaccurate in any respect.
+