Change travis to run fewer runs
Change travis to run fewer runs

- Remove Node 0.10
- Only run node-side tests with different node versions
- Only run Node 5.x when it is run with coverage

kategengler/ember-try,kategengler/ember-try,kategengler/totally-not-a-local-copy-of-ember-try,kategengler/totally-not-a-local-copy-of-ember-try,kategengler/ember-try,kategengler/totally-not-a-local-copy-of-ember-try