Bumped version to 0.6.1.
Bumped version to 0.6.1.

crs4/pyavroc,Byhiras/pyavroc,Byhiras/pyavroc,walshb/pyavroc,crs4/pyavroc,crs4/pyavroc,walshb/pyavroc,walshb/pyavroc,Byhiras/pyavroc,Byhiras/pyavroc,walshb/pyavroc