Release 1.1

Refs simonw#12

Release 1.0

Refs simonw#3 simonw#6 simonw#7 simonw#8 simonw#9

Added Circle CI badge to README

Release 0.5.1

Release 0.5

Release 0.4

Release 0.3.1

Release 0.2

Added badges, ready to release 0.1