change semantic of isValidInModule, such that is reflects the function name; isValid -> true if holds; false otherwise
isValidInProgram is checked for all feature expressions of referenced identifiers now
use full feature expression for isValidInProgram check, instead of annotation on AST elements, which may be incomplete
fix isValidInProgram for extract function
Merge pull request #3 from joliebig/cleanup

cleanup imports
Merge pull request #2 from joliebig/renaming
Fixed bug: prepared renamings have been empty after just one run.
Fixed introduced bug during morpheus options extraction from frontend options.
Fixed introduced nullpointer by using the complete featureExpr
debug...
remove debug
Optimized runtime for removing already used ids from prepared renamings
Optimized runtime for removing already used ids from prepared renamings
debug
debug
debug
debug
Added TODO and question for @joliebig
Minor code runtime optimization
Minor code runtime optimization