src: code cleanup

* removed unused code: ParseFunction, ParseVariable and ParseTypeUsage. All this is handled using NameHierarchies now.
* Moved the getErrorCount method from ParserClient to the StorageAccess
* MessageFinishedParsing doesn't know the error count anymore.
* StatusBarController now has a StorageAccess to fetch the error count when needed.

src/app/data/parser/cxx/TaskParseCxx.cpp

@@ -95,8 +95,7 @@ void TaskParseCxx::exit()
 	MessageFinishedParsing(
 		fileRegister->getParsedFilesCount(),
 		fileRegister->getFilesCount(),
-		utility::duration(m_start),
-		m_parser->getParserClient()->getErrorCount()
+		utility::duration(m_start)
 	).dispatch();
 }