Fix Travis failures.

Fixes two issues with Travis:

* Travis has inadvertently reverted to Git 1.7.9.5. This has been
 reported, and the suggested work around was to update git prior to
 running our script.  See
 [here](https://github.com/travis-ci/travis-ci/issues/1710) for details.
* The prior `script` was apparently invalid YAML (the `\[` is interpreted
 as an escape sequence).
* The `ember-easyForm-spade.js` file was not being generated properly
 because `"Ember EasyForm".dasherize` == "ember-easyform", but we
 expect "ember-easyForm". This works fine with the default OS X setup
 since filenames are case-insensitive, but Travis runs on Linux which
 is case sensitive. This was fixed in ember-dev
 [here](https://github.com/emberjs/ember-dev/pull/105).