New route: /health for monitoring if server is up
Merge pull request #68 from colegleason/health

New route: /health for monitoring if server is up
Merge pull request #69 from colegleason/webhook-refactor

WIP: Add tests for Github/Travis webhook
Making webhooks DRYer and quieter
Merge remote-tracking branch 'origin/master' into webhook-refactor

Conflicts:
	serve.go
refactor travis webhook tests
add travis auth