Kill the resource

Removes support for resource routes. Now only route is supported.

See #11 for more info.

Proper Index

Adds special handling for index routes. When running ember g route foo/index the generated route will be this.route('foo', function() {}).

If there is a route like this.route('foo', function() {}) running
ember d route foo/index will modify it to this.route('foo'); since we
are just removing the index.

For more info see #10.