Cleaning up some of the DIBS code

Most of the DIBS code is from the provider on World, there are quite a
few bits we do not use as this is MVC, so we don't need that code.
Removed last bit of EntityFramework

Removed from the main web project too. This closes #1
Setting DataDirectory on AppDomain from IInitializableModule

Since upgrading Commerce Manager package removes all custom code (also
in global.asax), we need to set the DataDirectory in another way.