Add "give kredits" button to contributor profiles

closes #172

app/styles/components/_contributor-profile.scss

@@ -42,6 +42,10 @@ section#contributor-profile {
         }
       }
     }
+
+    .actions {
+      margin-top: 2rem;
+    }
   }
 
   .actions {

app/templates/dashboard/contributors/show.hbs

@@ -22,6 +22,13 @@
         </li>
       {{/if}}
     </ul>
+    <div class="actions">
+      <p>
+        {{link-to "♥ Give kredits" "contributions.new"
+                  (query-params contributorId=model.id)
+                  class="button green"}}
+      </p>
+    </div>
   </div>
 
   <div class="actions">