Add missing messages.

Author: khatchad

edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/messages/messages.properties

@@ -6,4 +6,8 @@ CheckingPreconditions=Checking preconditions (may take a while)...
 CompilingSource=Compiling source ...
 CreatingChange=Creating change...
 NoStreamsHavePassedThePreconditions=No streams have passed preconditions.
-NoStreamsToOptimize=No streams to optimize.
+NoStreamsToOptimize=No streams to optimize.
+CUContainsCompileErrors=Member ''{0}'' has a compilation unit ''{1}'' that contains compilation errors.
+NoStreamsToConvert=No streams available for optimization.
+PreconditionFailed=No streams have passed precondition checking.
+RefactoringNotPossible=Refactoring not possible.