logic: source groups for project settings

* project can not have multiple source groups with different types
* language of a project is now inferred from source groups
* setting global NameHierarchy delimiter of first sourceGroup in project
* added project settings migrations for source groups
* Add Settings Migration classes (MoveKey, DeleteKey, Lambda)
* Update sample projects with migrations
* added method to config to retrieve sublevel key names
* implemented recursive removing of keys in settings
* moved project files out of top level
* removed solution parsing code as it is not used anymore

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src/lib/project/Project.h

@@ -0,0 +1,60 @@
+#ifndef PROJECT_H
+#define PROJECT_H
+
+#include <memory>
+#include <string>
+#include <set>
+#include <vector>
+
+#include "project/SourceGroup.h"
+
+class FilePath;
+class PersistentStorage;
+class ProjectSettings;
+class StorageAccessProxy;
+
+class Project
+{
+public:
+	Project(std::shared_ptr<ProjectSettings> settings, StorageAccessProxy* storageAccessProxy);
+	virtual ~Project();
+
+	bool refresh(bool forceRefresh);
+
+	FilePath getProjectSettingsFilePath() const;
+	std::string getDescription() const;
+
+	bool settingsEqualExceptNameAndLocation(const ProjectSettings& otherSettings) const;
+	void setStateSettingsUpdated();
+
+private:
+	enum ProjectStateType
+	{
+		PROJECT_STATE_NOT_LOADED,
+		PROJECT_STATE_EMPTY,
+		PROJECT_STATE_LOADED,
+		PROJECT_STATE_OUTDATED,
+		PROJECT_STATE_OUTVERSIONED,
+		PROJECT_STATE_SETTINGS_UPDATED,
+		PROJECT_STATE_NEEDS_MIGRATION
+	};
+
+	Project(const Project&);
+
+public: // todo: make private again
+	void load();
+
+private:
+	bool requestIndex(bool forceRefresh, bool needsFullRefresh);
+
+	void buildIndex(const std::set<FilePath>& filesToClean, bool fullRefresh);
+
+	std::shared_ptr<ProjectSettings> m_settings;
+	StorageAccessProxy* const m_storageAccessProxy;
+
+	ProjectStateType m_state;
+	std::shared_ptr<PersistentStorage> m_storage;
+	std::vector<std::shared_ptr<SourceGroup>> m_sourceGroups;
+};
+
+#endif // PROJECT_H