Feature/gather enhancements (#73)

* add bargein support to gather

* bugfix: gather handles interim results from azure

* gather: support for min/max digits and interdigit timeout

* add task summary to some log messages

* logging improvements

lib/utils/summarize-tasks.js

@@ -1,3 +1,3 @@
 module.exports = function(tasks) {
-  return `[${tasks.map((t) => t.name).join(',')}]`;
+  return `[${tasks.map((t) => t.summary).join(',')}]`;
 };