Clean up strain-species relationship

app/routes/measurements/index.js

@@ -2,6 +2,6 @@ import Ember from 'ember';
 
 export default Ember.Route.extend({
   model: function() {
-    return this.modelFor('strains/show').get('measurements');
+    return this.modelFor('strains/show').strain.get('measurements');
   }
 });

app/routes/strains/show.js

@@ -1,4 +1,10 @@
 import Ember from 'ember';
 
 export default Ember.Route.extend({
+  model: function(params) {
+    return Ember.RSVP.hash({
+      strain: this.store.find('strain', params.strain_id),
+      species: this.store.findAll('species')
+    });
+  }
 });