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/settings/SourceGroupSettings.h

@@ -0,0 +1,59 @@
+#ifndef SOURCE_GROUP_SETTINGS_H
+#define SOURCE_GROUP_SETTINGS_H
+
+#include <memory>
+#include <vector>
+
+#include "settings/LanguageType.h"
+#include "settings/ProjectSettings.h"
+#include "settings/SourceGroupType.h"
+
+class ProjectSettings;
+
+class SourceGroupSettings
+{
+public:
+	SourceGroupSettings(const std::string& id, SourceGroupType type, const ProjectSettings* projectSettings);
+	virtual ~SourceGroupSettings();
+
+	virtual bool equals(std::shared_ptr<SourceGroupSettings> other) const;
+
+	std::string getId() const;
+
+	FilePath getProjectFileLocation() const;
+	FilePath makePathAbsolute(const FilePath& path) const;
+
+	virtual std::vector<std::string> getAvailableLanguageStandards() const = 0;
+	virtual SourceGroupType getType() const;
+
+	std::string getStandard() const;
+	void setStandard(const std::string& standard);
+
+	std::vector<FilePath> getSourcePaths() const;
+	std::vector<FilePath> getAbsoluteSourcePaths() const;
+	void setSourcePaths(const std::vector<FilePath>& sourcePaths);
+
+	std::vector<FilePath> getExcludePaths() const;
+	std::vector<FilePath> getAbsoluteExcludePaths() const;
+	void setExcludePaths(const std::vector<FilePath>& excludePaths);
+
+	std::vector<std::string> getSourceExtensions() const;
+	void setSourceExtensions(const std::vector<std::string>& sourceExtensions);
+
+protected:
+	const ProjectSettings* m_projectSettings;
+
+private:
+	virtual std::vector<std::string> getDefaultSourceExtensions() const = 0;
+	virtual std::string getDefaultStandard() const = 0;
+
+	const std::string m_id;
+	const SourceGroupType m_type;
+
+	std::string m_standard;
+	std::vector<FilePath> m_sourcePaths;
+	std::vector<FilePath> m_excludePaths;
+	std::vector<std::string> m_sourceExtensions;
+};
+
+#endif // SOURCE_GROUP_SETTINGS_H