Updating Roslyn Parser

The RoslynParser wrapper is now capable of generating an IMethod
implementing object that exposes a collection of using directives as
well as the method body, parameter names and types.
See last commit
Revert "See last commit"

This reverts commit 041f44953ba2f3daca8445f7d376d75a7a5a2cb7.
Revert "Revert "See last commit""

This reverts commit bbd15d77d51e7048c70df63f5b47b5f744dede9b.