* 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
* Modify global configuration in the actions map
* Implement getter/setter for global and action configuration
* Implement quickly authenticators classes and add a todo LDAP authenticator
* Implement an actions map signals system and add some signals
* Add a Moulinette Interface for the cli and make it support signals
* Add a test namespace which implements configuration and authentication
* Move general_arguments to _global.arguments in the actions map
* Introduce global configuration in the actions map (need implementation!)
* Standardize arguments addition during the parser construction
* Fix action name with '-'
* 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
