Ref #3000 : API Rest Utils
Fixes #3280 : Add API Rest for Rules
Fixes #3294: API Rest for Directives
Fixes #3295 : API Rest for Groups
Fixes #3067: API Rest for Nodes
Ref #3000 : Some little corrections, licence, and reorganisation (remove rest services package)
Fixes #3695 : Add API Authentication, and web page to handle those
accounts
Merge pull request #261 from VinceMacBuche/ust_3000/dev/3695_add_rest_authentication

Fixes #3000 : Rudder API Rest