Move contributors + proposals to service

With this change we have all the contributors + proposals all the time in one place and can update them via events.

app/routes/index.js

@@ -1,22 +0,0 @@
-import Ember from 'ember';
-
-export default Ember.Route.extend({
-
-  kredits: Ember.inject.service(),
-
-  model() {
-    let newContributor = Ember.getOwner(this).lookup('model:contributor');
-    newContributor.set('kind', 'person');
-
-    let kredits = this.get('kredits');
-    let totalSupply = kredits.get('kredits').Token.functions.totalSupply();
-
-    return Ember.RSVP.hash({
-      contributors: kredits.getContributors(),
-      proposals: kredits.getProposals(),
-      totalSupply,
-      newContributor: newContributor,
-    });
-  }
-
-});