Changelog generator, closes #68

[fabn]

You can use this awesome gem to maintain a properly formatted changelog file with links to issues, PR and full diff for each version.

I generated an example changelog (date and version info still missing because of missing tags in your repo) here: https://gist.github.com/fabn/32f51f88a6f29c718dd5

I used the version history to properly tag all releases after 0.1.3 in my fork, so you can grab them from my repo if you wish.

If you merge this PR you can generate a full and up to date changelog with

rake changelog

Finally if you want to manage which issues are listed in changelog you should use github labels to exclude issues from generated file. For instance you can skip issues like #170 by labeling them as invalid.

If you want I can help you to tag issues, but in order to do that you should add me as collaborator.

Please merge this, this project deserves a changelog.

[swanandp]

Very cool, thanks

[swanandp]

@fabn It's been long due, so added you as a collaborator now.

[brendon]

Welcome! :)