dnfdragora: New snapshot, use CMake build system
- New snapshot (rev a26c6b8c307ed5b28971c5455f8ed9e0622b79a9, 2017-01-14 18:50Z)
- Use the new CMake build system instead of handwritten shell snippets
- Use the new upstream .desktop (menu entry) and .yaml (config) files
- Upstream added a .appdata file, ship it