Gitea (community-driven Gogs) integration

[tomsiwik]

Related to: http://discourse.drone.io/t/drone-0-5-and-gogs-gitea/301

Gitea's development is currently flourishing and i would be happy to see integrations/plugins for drone. Especially since Gitea is actively developing on the Oauth front and more.
'Some' improvements on the api can be found here: go-gitea/gitea#64

See also: go-gitea/gitea#27

[ekozan]

you have forgot the best of all : go-gitea/gitea#1332

[bradrydzewski]

merged pull request from @appleboy. Will be included in 0.7 release