added ability to add contact by searching by username, and validated that usernames are unique
Merge pull request #9 from kaplanoah/master

added ability to add contact by searching by username
added display of incoming and outgoing invites, fixed bugs in invites create method and jquery
Merge pull request #10 from kaplanoah/master

added display of incoming and outgoing invites
pulling in search and validations from upstream master
updated changes to support merge. changed index, meets controller and application css