Try out the new beta build environment

`sudo: false` sends the build to the new setup. Faster boot times, less waiting, and better network perf.

Also a little .travis.yml cleanup.
remove the bundler downgrade

this will allow rspec-rails to use --retry and --jobs
Merge branch 'master' into patch-1

Conflicts:
	.travis.yml
moar retries, more jobs
Merge pull request #1145 from joshk/patch-1

Try out the new beta build environment