Provide exception key for failed jobs.

Author: chawco

pyres/failure/redis.py

@@ -12,6 +12,7 @@ def save(self, resq=None):
         data = {
             'failed_at' : datetime.datetime.now().strftime('%Y/%m/%d %H:%M:%S'),
             'payload'   : self._payload,
+            'exception' : self._exception.__class__.__name__,
             'error'     : self._parse_message(self._exception),
             'backtrace' : self._parse_traceback(self._traceback),
             'queue'     : self._queue

resweb/templates/failed.mustache

@@ -41,10 +41,12 @@ function delete_all(){
         <dd><code>{{payload_class}}</code></dd>
         <dt>Arguments</dt>
         <dd><pre>{{payload_args}}</pre></dd>
+        <dt>Exception</dt>
+        <dd><pre>{{exception}}</pre></dd>
         <dt>Error</dt>
         <dd>
           <a href="#" class="backtrace">{{error}}</a>
-          <pre style='display:none'>{{traceback}}</pre>          
+          <pre style='display:none'>{{traceback}}</pre>
         </dd>
 		<dt>
 		  Payload Actions