Making suggestions

Working on top of #29 (all commits were squashed into one).

Following (somewhat) the structure proposed [on this tute](http://balinterdi.com/2014/02/26/a-common-resource-route-pattern-in-ember-dot-js.html).

Also got stuck on creating the record for suggestion and associating it with the parent initiative. Looks like there's an [ember data bug](http://discuss.emberjs.com/t/ember-data-fixture-adapter-saving-record-loses-has-many-relationships/2821/6) that might be at play here. Tried adding a hack in an initializer, but nothing it. Royal PITA :P

On the bright side, the routing makes sense now, and once we can get the suggestion / initiative association saving, it should be easy to get the listing going after that. Hopefully :)