Implemented Remove action for groups
Upgrade schema for user and groups
Add groups even when the user had not entered ',' and check if groups is empty
Modified User and Groups hibernate beans to be timestamped. Create resources for single and plural forms.
Adding todo for using timestamped responses
Adding authorization. Cleaning up code
Authenticating query was causing an exception when HSQL
Adding upgrade steps to 2.0.0 to create User and Groups table
Delete Acl permissions associated to a user/group when deleting a user/group
Fixing issues following rebase with current master branch
Merge pull request #242 from emorency/feature/OPAL-1878-user-groups

OPAL-1878: user groups management