Better feedback on verification delay.

Fixes ChrisBoesch#42

It would not show the message about the delayed verification if the status was unknown.

Possible improvement:
- Display the message if the verification takes more than 6s.
- Display a timer for the expected delay.

src/singpath/app.js

@@ -183,6 +183,12 @@
           });
         },
 
+        verifierStatus: function() {
+          return $http.get('/api/verifier').then(function(resp) {
+            return resp.data;
+          });
+        },
+
         paths: {
           _Factory: spfFirebase.objFactory({
             $canBeEditedBy: function(user) {

src/singpath/components/problems/problems.js

@@ -474,9 +474,11 @@
           self.profileNeedsUpdate = !self.currentUser.$completed();
         }).then(function() {
           return spfDataStore.solutions.create(problem, currentUser.publicId, solution);
-        }).then(function(resp) {
-          self.serverIsRunning = resp.serverIsRunning;
+        }).then(function() {
           spfAlert.success('Solution saved');
+          return spfDataStore.verifierStatus();
+        }).then(function(serverInfo) {
+          self.serverIsRunning = serverInfo.status === 'running';
         }).catch(function(err) {
           spfAlert.error(err.message || err.toString());
         }).finally(function() {