Mail service

The IntelliCloud mail service subscribes itself to the inbox of
intellicloudquestions@gmail.com. Once a new e-mail is received the
server pushes the message to the service where the message is being send
to the backend. Then a confirmation e-mail is send to the questioneer.
Mail service dlls
Updated app.conf in data layer.
Merged master repo in my fork.
Fixed bug in context regarding to LanguageDefinitions and bug fix in the create question method
processed feedback teun
Merge pull request #28 from daanvc/master

Fixed bug in context regarding to LanguageDefinitions and bug fix in the...
Merge remote-tracking branch 'upstream/master'
updated the Feedback and Answer Managers so they work error free
Mail service update

- FIXED: Incoming mails are send to the webservice
- ADDED: A confirmation mail is send to the questioneer
- ADDED: Unit Tests
Merge pull request #30 from koekoek/master

Mail service update
Added PostId and IsPrivate to CreateQuestion.
Merge pull request #29 from daanvc/master

updated the Feedback and Answer Managers so they work error free
Added classes used for user authorization.
Sorted usings.
Added send answer plugin factory.
Merge remote-tracking branch 'upstream/master'
Added AuthorizationHandler, updated authorization classes.
Merge pull request #31 from jorisvervuurt/master

Added main classes used for user authorization.
Added required references for reading HTTP header fields.