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/lib/data/access/StorageAccessProxy.cpp

@@ -275,6 +275,16 @@ TimePoint StorageAccessProxy::getFileModificationTime(const FilePath& filePath)
 	return TimePoint(boost::posix_time::not_a_date_time);
 }
 
+ErrorCountInfo StorageAccessProxy::getErrorCount() const
+{
+	if (hasSubject())
+	{
+		return m_subject->getErrorCount();
+	}
+
+	return ErrorCountInfo();
+}
+
 StorageStats StorageAccessProxy::getStorageStats() const
 {
 	if (hasSubject())