Added gitter support
Merge pull request #504 from Bugagazavr/exp-gitter

Gitter notifications
fixed incorrect url prefix `/v1`
Merge remote-tracking branch 'origin/exp' into exp
updating npm publish for #516
added tests for npm changes #516
Add image/svg+xml content-type to badge handler
Merge pull request #520 from floatdrop/exp

Add image/svg+xml content-type to badge handler