Post release version bump: 0.5.12a
Post release version bump: 0.5.12a

harrissoerja/vumi,TouK/vumi,TouK/vumi,harrissoerja/vumi,vishwaprakashmishra/xmatrix,harrissoerja/vumi,vishwaprakashmishra/xmatrix,vishwaprakashmishra/xmatrix,TouK/vumi