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

fortune cookie message = The secret of getting ahead is getting started.

src/lib/settings/SourceGroupSettingsCxx.h

@@ -0,0 +1,51 @@
+#ifndef SOURCE_GROUP_SETTINGS_CXX_H
+#define SOURCE_GROUP_SETTINGS_CXX_H
+
+#include "settings/SourceGroupSettings.h"
+
+class SourceGroupSettingsCxx
+	: public SourceGroupSettings
+{
+public:
+	SourceGroupSettingsCxx(const std::string& id, SourceGroupType type, const ProjectSettings* projectSettings);
+	virtual ~SourceGroupSettingsCxx();
+
+	virtual bool equals(std::shared_ptr<SourceGroupSettings> other) const;
+
+	virtual std::vector<std::string> getAvailableLanguageStandards() const;
+
+	std::vector<FilePath> getHeaderSearchPaths() const;
+	std::vector<FilePath> getAbsoluteHeaderSearchPaths() const;
+	void setHeaderSearchPaths(const std::vector<FilePath>& headerSearchPaths);
+
+	std::vector<FilePath> getFrameworkSearchPaths() const;
+	std::vector<FilePath> getAbsoluteFrameworkSearchPaths() const;
+	void setFrameworkSearchPaths(const std::vector<FilePath>& frameworkSearchPaths);
+
+	std::vector<std::string> getCompilerFlags() const;
+	void setCompilerFlags(const std::vector<std::string>& compilerFlags);
+
+	// deprecated begin
+	bool getUseSourcePathsForHeaderSearch() const;
+	void setUseSourcePathsForHeaderSearch(bool useSourcePathsForHeaderSearch);
+	bool getHasDefinedUseSourcePathsForHeaderSearch() const;
+	void setHasDefinedUseSourcePathsForHeaderSearch(bool hasDefinedUseSourcePathsForHeaderSearch);
+	// deprecated end
+
+	FilePath getCompilationDatabasePath() const;
+	FilePath getAbsoluteCompilationDatabasePath() const;
+	void setCompilationDatabasePath(const FilePath& compilationDatabasePath);
+
+private:
+	virtual std::vector<std::string> getDefaultSourceExtensions() const;
+	virtual std::string getDefaultStandard() const;
+
+	std::vector<FilePath> m_headerSearchPaths;
+	std::vector<FilePath> m_frameworkSearchPaths;
+	std::vector<std::string> m_compilerFlags;
+	bool m_useSourcePathsForHeaderSearch;
+	bool m_hasDefinedUseSourcePathsForHeaderSearch;
+	FilePath m_compilationDatabasePath;
+};
+
+#endif // SOURCE_GROUP_SETTINGS_CXX_H