added groups to user resource + method to assign edit permission of current bucket to a group + added name field for buckets
fix assign method accepting json now
Merge pull request #15 from freddylimpens/master

added groups to user resource + method to assign edit permission of curr...
fix background images siaze
Merge branch 'master' of https://github.com/UnissonCo/dataserver
assign automatically change perms to user group
Merge branch 'master' of https://github.com/UnissonCo/dataserver into gup