#114 Fix; couchbeam:reply_att/1 handles 20x as success
#114 Fix; couchbeam:reply_att/1 handles 200 & 201 as success
Merge pull request #115 from epappas/master

#114 Fix; couchbeam:reply_att/1 handles 200 & 201 as success
bump hackney version to 0.15.0

this release give major improvements to couchbeam.
test status new head response signature from hackney

Head response from hackney is already handling the body part and now return
{ok, Status, Header}. This change wasn't handled when checking the epected
status of the response.

fix #116
bump to 1.1.1