* Move actions map parsers classes into their respective interface modules
* Introduce an Interface base class for a futur usage
* Each interfaces must now implement ActionsMapParser and Interface classes
* Standardize interface instantiation
* Move authenticators classes into distinct modules
* Standardize MoulinetteError which is now a child class of IOError
* Add methods from helpers.py to LDAP authenticator class
* Review authenticator and action configuration storage
* Small changes in error printing on MoulinetteError raising
* Update the API to support authenticators and session token
* Add a function to clean sessions
* Make the API fit in better with actions map
* Minor changes on test namespace
* Revert to classes centralization into actionsmap.py
* Try to optimize conditions and loops
* Revisit Package class and get directories from a file generated at build
* Early refactoring of i18n
* Move yunohost library into /lib
* Remove 'core' folder and reorganize root package structure
* Introduce interface's base class and implement 'api' and 'cli'
* Add a Package class and a moulinette initialization method
* Start to replace YunoHostError by MoulinetteError
* Fix actionsmap/yunohost.yml to follow extra parameters rules
