IntelliCloud Facebook service

Windows service that:
- Checks if the IntelliCloud Facebook page contains new posts
- Sends new posts to database
- Keeps track of the time of the post that was last send to the database
Added references
Merge remote-tracking branch 'upstream/master'
Created the Facebook plugin

Created the Facebook plugin that can post comments to questions asked
through Facebook.
Facebook service - Added postId to web request
Updated Services after feedback from Kees.
Fixed some stuff in new service interfaces
Added comments and changed variables to properties
Merge pull request #58 from geertvh/master

answer tests added, summaries fixed, validation tests fixed
bug fix in usertest and added response message to the create answer method
Merge pull request #59 from daanvc/master

bug fix in usertest and added response message to the create answer meth...
New service interfaces added. Removed old ones.
Fixed csproj file.
Merged pull request from teugis/master.
Removed gost files.
Fixed merge problems pull request koekoek-master.
implemented all the service intefaces
Merge remote-tracking branch 'upstream/master'
Merge pull request #61 from daanvc/master

implemented all the service intefaces
implemented answer manager, still waiting on Geert van Hoesel to create the search algorithm