add example row for gene_functions argument

bump version to 0.0.22

Merge branch 'master' of github.com:gamcil/clinker

bump version to 0.0.20

bump version to 0.0.19

bump version to 0.0.18

bump version to 0.0.17

bump version to 0.0.16

bump version to 0.0.15

bump version to 0.0.14