logic: File Manager

* added FileManager that keeps track of the files analyzed by the project. It therefore checks if files get added, updated or deleted from the source- and include folders.
* refactored ASTVisitor::hasValidLocation() and implemented one version that search for the location in the currently parsed file and one that searches in all the project's source files.
* quickfix: switched order in FileManager so that header files are parsed first.
* created folder for helper classes used in tests.
* added test code for FileManager
* adjusted test code for Parser Tests.

src/lib/data/parser/cxx/ASTActionFactory.cpp

@@ -1,7 +1,8 @@
 #include "data/parser/cxx/ASTActionFactory.h"
 
-ASTActionFactory::ASTActionFactory(ParserClient* client)
+ASTActionFactory::ASTActionFactory(ParserClient* client, FileManager* fileManager)
 	: m_client(client)
+	, m_fileManager(fileManager)
 {
 }
 
@@ -11,5 +12,5 @@ ASTActionFactory::~ASTActionFactory()
 
 clang::FrontendAction* ASTActionFactory::create()
 {
-	return new ASTAction(m_client);
+	return new ASTAction(m_client, m_fileManager);
 }