Implement the case where raw object is an instance
Implement the case where raw object is an instance

There is still a bug in this implementation.
The corresponding test fails.

jonashaag/jedi,dwillmer/jedi,flurischt/jedi,mfussenegger/jedi,jonashaag/jedi,WoLpH/jedi,mfussenegger/jedi,flurischt/jedi,tjwei/jedi,WoLpH/jedi,tjwei/jedi,dwillmer/jedi