added missing @Override annotations.
inlined the PDTTypeInferenceUtils#getTypes(PHPCallExpression, ISourceModule, ASTNode) method into the getTypes(PHPCallExpression, ISourceModule) method. (Issue #48)
removed the PHPRenameProcessor#currentName field. (Issue #48)
changed the RenameMethodProcessor#updateReferences() to update method references properly. (Issue #48)
changed the PHPRenameProcessor#renameDeclaration(IProgressMonitor) method so as to call the renameDeclaration(IProgressMonitor, IModelElement, ISourceModule) method. (Issue #48)
added missing null check in the RenameMethodProcessor#updateReferences(IProgressMonitor, IMethod) method. (Issue #48)