Moved from compound to americano

Noticeable changes:

* I have reworked the cakefile
    * files to lint are automatically generated
    * better error detection (if tools are not globally installed)
    * cake tests new option: -e (--env) production|development|test (default is test) to handle NODE_ENV automatically
    * cake tests options removed: --debug and --debug-brk. I feel like they are not part of the base toolkit and should be added for specific uses (e.g. Jenkins) in specific repositories

* I have reworked the tests
    * cozy-fixtures is now part of the base toolkit
    * "helpers" file added to manage app start/stop and db cleaning stuff 

* I have added cozy-specific fields in the package.json. I will add the related documentation URL next to them when it'll be ready. Also I cleaned and upgraded to the latest version the dependencies.

* I have added americano's documentation links to the relevant part in the code.