data: Saving TokenLocations in Storage

This change adds structures for saving TokenLocations in the Storage and improves the location derival in the
ASTVisitor:
* TokenLocation saves an Id of a Token. For each Token two TokenLocations are created for both start- and endpoint. They
  keep a reference to each other and know whether they are start or end.
* TokenLocationLine saves all TokenLocations in a line and the lineNumber.
* TokenLocationFile saves all TokenLocationLines of a specific file and the filePath.
* TokenLocationCollection saves multiple TokenLocationFiles.
* TokenLocation can derive it's lineNumber and filePath through references to first TokenLocationLine and from there to
  TokenLocationFile.

src/lib/Project.cpp

@@ -46,6 +46,8 @@ void Project::parseCode()
 		parser.parseFiles(
 			FileSystem::getSourceFilesFromDirectory(ProjectSettings::getInstance()->getSourcePath(), extension)
 		);
+
 		m_storage->logGraph();
+		m_storage->logLocations();
 	}
 }