DB implementation -  Final (At least I hope so)

*** At the Service
- First full version of DB implementation based on MS SQL and Entity
framework
- Removed JSON based Data layer
- Utilities project was splitted to CommonTypes project and DAL projects
- Added another operation to the Service contract which enable the
client to get full user meta data in one call
- Few other Minor changes

***At the test app
- Adjustment to the changes in the service contract.
- Few other minor modifications