New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/drape_frontend/user_marks_provider.cpp

@@ -0,0 +1,16 @@
+#include "user_marks_provider.hpp"
+
+namespace df
+{
+UserPointMark::UserPointMark(kml::MarkId id)
+  : m_id(id)
+{
+}
+
+
+UserLineMark::UserLineMark(kml::TrackId id)
+  : m_id(id)
+{
+}
+
+}  // namespace df