MPS Psi: not working yet rename refactoring; Psi stubs work
Merge branch 'danya'

Conflicts:
	IdeaPlugin/mps-core/src/jetbrains/mps/idea/core/psi/impl/ClassStubPsiMapper.java
	IdeaPlugin/solutions/jetbrains.mps.idea.java.psiStubs/source_gen.caches/jetbrains/mps/idea/java/psiStubs/generated
	IdeaPlugin/solutions/jetbrains.mps.idea.java.psiStubs/source_gen/jetbrains/mps/idea/java/psiStubs/PsiJavaStubModelDescriptor.java
Resolve of conflicts after merge
Merge branch 'danya'

Conflicts:
	IdeaPlugin/mps-core/src/jetbrains/mps/idea/core/psi/impl/ClassStubPsiMapper.java
	IdeaPlugin/mps-core/src/jetbrains/mps/idea/core/psi/impl/MPSPsiProvider.java
	IdeaPlugin/mps-java/src/jetbrains/mps/idea/java/psi/impl/JavaMPSPsiNodeFactory.java
Fixes after merge
fix scopes