v1.1.0

[220d3a5] Add files_to_watch configuration option: it will run the dump command on each file change in this list.
[d36edfd] Quite big update:

• Add gitignore file.
• Remove examples and replaced them with comments.
• Replaced cssnano with clean-css (seems to be faster and less conflictual...)
• Put tasks in "if"s when they're not available, it helps having faster watch and dump commands for example when you don't have anything in some config options. For example, if you only have js and less configured, images, css and sass will never be executed. Saves memory and time.
• Optimized a little the code
• Make "dump" use only specified tasks to be faster (view [d36edfd] too)

[aa20133] Update README.md to fix some terms and add docs
[a722b64] Add images support with imagemin to compress images in a specific directory.
[ffc0d2a] Removed autoprefixer, useless in this world of brand new nightly-updated browsers (and less conflictual too, yep).