Better Travis-CI notification format

The new version looks like:
```
travis-ci: [travis-ci] passed: sellout/slamengine#3 (minor-fixes@d06cbf2: Greg Pfeil) http://travis-ci.org/sellout/slamengine/builds/29027247
```
and the old one was
```
travis-ci: [travis-ci] slamdata/slamengine#37 (master - 5f167ae : John A. De Goes): The build passed.
travis-ci: [travis-ci] Change view : https://github.com/slamdata/slamengine/compare/a67bf222237f...5f167aea5065
travis-ci: [travis-ci] Build details : http://travis-ci.org/slamdata/slamengine/builds/29019082
```
I’d like to also remove the redundant `[travis-ci]` from the message, but that seems baked-in.