data: Added HeaderSearchPaths to Application- and ProjectSettings

This change allows for parsing of a real codebase by specifying the system header search paths in
ApplicationSettings.xml and the additional header search paths in ProjectSettings.xml.

Both settings files are now documented in ApplicationSettings_template.xml and ProjectSettings_template.xml, which show
all possible settings for each file.

This change also fixes some parsing edge cases that occured.

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

@@ -13,12 +13,41 @@ CxxParser::~CxxParser()
 {
 }
 
-void CxxParser::parseFiles(const std::vector<std::string>& filePaths)
-{
-	// Fake commandline flags passed to the programm. Everything after '--' will be interpreted by the ClangTool.
+void CxxParser::parseFiles(
+	const std::vector<std::string>& filePaths,
+	const std::vector<std::string>& systemHeaderSearchPaths,
+	const std::vector<std::string>& headerSearchPaths
+){
+	// Commandline flags passed to the programm. Everything after '--' will be interpreted by the ClangTool.
+	std::vector<std::string> args;
+	args.push_back("app");
+	args.push_back("--");
+
+	// verbose
+	// args.push_back("-v");
+
 	// The option '-x c++' treats subsequent input files as C++.
-	const char* argv[] = { "app", "--", "-x", "c++" };
-	int argc = 4;
+	args.push_back("-x");
+	args.push_back("c++");
+
+	args.push_back("-std=c++11");
+
+	for (const std::string& path : systemHeaderSearchPaths)
+	{
+		args.push_back("-isystem" + path);
+	}
+
+	for (const std::string& path : headerSearchPaths)
+	{
+		args.push_back("-I" + path);
+	}
+
+	int argc = args.size();
+	const char** argv = new const char*[argc];
+	for (size_t i = 0; i < args.size(); i++)
+	{
+		argv[i] = args[i].c_str();
+	}
 
 	std::shared_ptr<clang::tooling::FixedCompilationDatabase> compilationDatabase(
 		clang::tooling::FixedCompilationDatabase::loadFromCommandLine(argc, argv)