v0.1.6

Changelog

80140db Merge remote-tracking branch 'origin/master'
917c31c update deps
71c60ef add SWAGGER doc about rest API
775fa9e add REST api
e4d36df big internal rework. code cleanup and restructured. consul and critical moved to plugins. backward capability exists.
8d34384 Merge pull request #10 from morya/master
f3798db headers in http plugin config not working