Added Gitter badge
Merge pull request #769 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
spellcheck
Use the new build env on Travis

http://docs.travis-ci.com/user/workers/container-based-infrastructure
Merge pull request #780 from morpheyesh/master

spellcheck
Merge pull request #785 from joshk/patch-1

Use the new build env on Travis
Merge branch 'master' of github.com:gogits/gogs into dev