New app: MultiROM Manager

Closed username-removed-45797 requested to merge vbocek/fdroiddata:master into master

Add app for MultiROM modification. This modifications implements multiboot for android devices. You can find more info on Google Play or in XDA threads:

I'm not sure if it is gonna build on your aumated server - it builds on my computer just by using "gradle build" in the root of the repository, so hopefuly it should.