[feature] - groups managment in core - under construction
Merge branch 'master' into groups
[refactor] separate code in different models
[feature] groupModule in separate file
Merge branch 'master' into groups

Conflicts:
	models/userModel.js
[fix] codestyle
[feature] - groups in kernel - furhter work
[fix] codestyle
[fix] removed function to get group messages
Merge remote-tracking branch 'origin/groups' into groups
Merge branch 'master' into groups
[feature] working on group model
[feature] working on group model
[fix] - less ugly code
[fix] - extended placeholder
[feature] placeholder for kabam-rest-plugin compatibility
[feature] group.canRead, group.canWrite for group object works with kabam-plugin-rest
[feature] group.canCreate works for root user
[fix] typo
[fix] auth test respects the port number