Fix refs to System.ComponentModel.Composition

Since we switched to .NET 4.0 and MEF is built-in there is no need to
refer to the CodePlex version of the library.
Do not deploy System.ComponentModel.Composition
Delete entry fee bookings, issue #323
Merge branch 'master' of https://github.com/PavelBastov/opencbs
Merge branch 'master' into apr_for_aim