Updated DB schema

I found some additional relationships whilst
exploring the DB and thinking about issue #34.
Merge pull request #52 from philosophicles/master

Updated DB schema
Moved ExternalLoginBundle and SocialApiBundle out into separate repos (as they're meant to be non-Camdram specific).
`composer.phar install` will bring them back into the vendors directory
Brought TimePeriodFixtures up to date with recent changes to time periods. Should hopefully fix tests...
Added tests for TextService #45
Added unit tests for some classes in CamdramBundle/Service #45
Adds ability to assign, reassign, resolve, and reject isssues.
Merge branch 'master' of https://github.com/camdram/camdram
Initial commit of CamdramApiBundle #24
Merge branch 'master' of github.com:camdram/camdram
Fixed error on techie advert page
Adds previous emails in the support thread to the Entity and displays them in the view.
Merge branch 'master' of https://github.com/camdram/camdram
Fixed service name in ApiBundle (copy and paste error meant 'college' form type was overridden) #24
Created new 'ClassIdentity' object to wrap the class name when making ACL requests in non-object-specific situations. CMF bundle throws errors when 'object' is a string #51
Start of fixing full text search
Made AdminVoter slightly more restrictive and added unit tests for all voters #51
Tweaked certain Doctrine annotations to clear Dotrine warnings
Added create Camdram account from external account function. #51
Allowed users to 'claim' a person
Fixed a couple of errors on Tiberius