Add requesting/offering access roster groups.
Edit UI tests to account for two sets of contacts.
Rename both new groups to "Pending".
Merge branch 'dev' of https://github.com/uProxy/uproxy into lucyhe-invite_request_categories
Change roster-panel back to id.
Rename getCategory to getCategories
Change 'Pending' group titles to teal.
Merge pull request #623 from uProxy/lucyhe-invite_request_categories

Create Invitations/Requests categories in buddylist.
Merge with origin/dev.