0.3, Forming right redirect url for enterprise

This fixes redirect loop for github enterprise users.

But I still got `Error retrieving currently authenticated GitHub user. Unauthorized` error.
Merge pull request #407 from floatdrop/patch-1

0.3, Forming right redirect url for enterprise
setting the github client API url for github enterprise
added email notifications
initial work to re-implement the GitHub status API (issue #403)
github status API now functioning properly
fixed missing dep in Makefile
improved email subject
some minor changes to make more responsive
removed commit progression arrow on cell phone
fixed margin issues on repo list page, on mobile debices
Update hook.go

added logging when post-commit hook received
Update filters.js

fixed issue w/ github enterprise and not display correct URL path
Merge remote-tracking branch 'origin/exp' into exp
adding repo url to build environment
fixed minor sync error where members were not granted access
moved `drone build` to cmd folder
remove bash completion
setting and checking random state in OAuth flow
more work on the command line utility