Merge branch 'release-0.8'
Fixes #218: changed MetadataExtension in order to get the subject attribute of derived and base classes
Merge branch 'hotfix-0.8.1' into develop

Conflicts:
	Source/Runners/Machine.Specifications.ReSharper.Runner/MetadataExtensions.cs
	Source/Runners/Machine.Specifications.ReSharperRunner.6.1/MetadataExtensions.cs