* Tighten constrains on bucket names

#74

#73

#48

#53

#49

#46

#43

#32

 * Add search user modal
 * Select users by their name instead of their uid
 * Display name of user when listing bucket permissions

#22

 * Content Type for objects
 * number of objects in a bucket
 * Size of a bucket

#16

#2

#2