Support for new portable profile 7 (WIP)

I'm currently getting the error:

>Could not load type 'System.Object' from assembly 'System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' because the parent does not exist.

This error happens on the first call to asm.GetType("type") when asm is FSharp.Data.dll of profile 7

I currently have no clue on how to fix this