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_java/project/SourceGroupFactoryModuleJava.cpp

@@ -0,0 +1,30 @@
+#include "project/SourceGroupFactoryModuleJava.h"
+
+#include "project/SourceGroupJava.h"
+
+SourceGroupFactoryModuleJava::~SourceGroupFactoryModuleJava()
+{
+}
+
+bool SourceGroupFactoryModuleJava::supports(SourceGroupType type) const
+{
+	switch (type)
+	{
+	case SOURCE_GROUP_JAVA_EMPTY:
+	case SOURCE_GROUP_JAVA_MAVEN:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
+std::shared_ptr<SourceGroup> SourceGroupFactoryModuleJava::createSourceGroup(std::shared_ptr<SourceGroupSettings> settings)
+{
+	std::shared_ptr<SourceGroup> sourceGroup;
+	if (std::shared_ptr<SourceGroupSettingsJava> javaSettings = std::dynamic_pointer_cast<SourceGroupSettingsJava>(settings))
+	{
+		sourceGroup = std::shared_ptr<SourceGroup>(new SourceGroupJava(javaSettings));
+	}
+	return sourceGroup;
+}