Change App.CName to allow add multiple cnames to app. Change SetCName to AddCName.
Change testing FakeApp to multiple cnames
Change AddCName docs
router/hipache: change router to deal with multiple cnames.
move ClearRedisKeys function to testing/redis package
move ClearRedisKey to testing/redis package
api/app: change SetCName to AddCname
api/app_test: change SetCName tests to AddCName
router/hipache: UnsetCName remove from multiple cnames.
app/app: change UnsetCName to RemoveCName and support remove multiples cnames.
api/app: api addCName accepts multiple cnames
app: expose cnames as strings separeted by comma
cmd/tsuru-base/apps: Change SetCname to accept multiple cnames
app/app: MarshalJSON returns cname list
api/app: remove cnames from app
cmd/tsuru-base/apps: change cname type to list
cmd/tsuru-base/apps: change unset-cname to remove-cname and allow remove multiple cnames