add features:
- implement database
- upgrades
- achievement
Merge branch 'master' of https://github.com/dyngts/Gasing-Mania

Conflicts:
	Event sheets/achievement_event.xml
	Gasing Mania ZX.caproj
Merge branch 'master' of https://github.com/dyngts/Gasing-Mania

Conflicts:
	Event sheets/achievement_event.xml
	Gasing Mania ZX.caproj