adding progress to Job api

Author: Chris McKenzie

zencoder/core.py

@@ -289,6 +289,10 @@ def details(self, job_id):
         data = {'api_key': self.api_key}
         return self.get(self.base_url + '/%s' % str(job_id), data=data)
 
+    def progress(self, job_id):
+        data = {'api_key': self.api_key}
+        return self.get(self.base_url + '/%s/progress' % str(job_id), data=data)
+
     def resubmit(self, job_id):
         """
         Resubmits a job