feat(build runner): added in context, dockerfile_location

this is a new feature meant to allow people to use any file as
  a dockerfile and any folder as a context directory

static/directives/repo-view/repo-panel-builds.html

@@ -119,6 +119,7 @@
           <thead>
             <td>Trigger Name</td>
             <td>Dockerfile Location</td>
+            <td>Context Location</td>
             <td>Branches/Tags</td>
             <td>Pull Robot</td>
             <td class="options-col"></td>
@@ -133,7 +134,8 @@
 
           <tr ng-repeat="trigger in triggers | filter:{'is_active':true}">
             <td><div class="trigger-description" trigger="trigger"></div></td>
-            <td>{{ trigger.config.subdir || '/' }}</td>
+            <td>{{ trigger.config.dockerfile_path || '/Dockerfile' }}</td>
+            <td>{{ trigger.config.context  || '/' }}</td>
             <td>{{ trigger.config.branchtag_regex || 'All' }}</td>
             <td>
               <span class="entity-reference" entity="trigger.pull_robot" ng-if="trigger.pull_robot"></span>