data: saving for projectsettings

<description>

src/lib/Project.h

@@ -17,6 +17,7 @@ public:
 	~Project();
 
 	bool loadProjectSettings(const std::string& projectSettingsFile);
+	bool saveProjectSettings(const std::string& projectSettingsFile);
 	void clearProjectSettings();
 
 	bool setSourceDirectoryPath(const std::string& sourceDirectoryPath);
@@ -29,6 +30,8 @@ private:
 	Project(const Project&);
 	Project operator=(const Project&);
 
+	std::string m_projectSettingsFilepath;
+
 	GraphAccessProxy* const m_graphAccessProxy;
 	LocationAccessProxy* const m_locationAccessProxy;