Bumping to 0.9.1

Merge branch 'kelvinhokk-master'

bumping version to 0.8.9

Bumping to 0.8.8

Bumping version to 0.8.7

bumping to 0.8.5

Bumping version to 0.8.4

bumping version to 0.8.3

tagging 0.8.2

tagging 0.8.1