.gitignore: remove .jhw-cache

The new build system uses mocha-phantomjs, not jasmine-headless-webkit.
.jshintrc: remove SC from globals

SproutCore has long since turned into Ember.
Improve Make targets

The switch from Rake to Make lost the ability to generate
`dist/ember-resource.js`. This

 * adds a Make target for that file that uses `cat`
 * makes the default task `dist`, which generates that file and then
   runs JSHint on it
 * adds a special `ci` task, which currently just runs `dist`
Run JSHint on src/vendor/*.js

`src/vendor/lru.js` had several JSHint violations, which in turn caused
`dist/ember-resource.js` to have violations. The `jshint` Make target
now also checks `src/vendor/*.js` and I have cleaned up the violations.
package.json: remove Handlebars dependency

That snuck in while I was doing some testing against Ember 1.0, which
this project doesn't (yet) do.