some initial feedback from HCA... will cleanup

Feedback.md

@@ -1 +1,17 @@
+## Overview
+
 Let's use this to collect feedback from drivers
+
+## HCA
+
+* definition of a workflow: 1) workflow descriptor, 2) execution of a workflow, 3) pre-defined workflow on a system.
+* workflow_params: doesn’t fit in with WDL... JSON you give a WDL executor is not typed, just strings.  
+    * AI: can we have File and Directory type in WDL JSON param file, see pull request
+* env specific param
+    * requirements for disk, memory, cpu
+    * workflow options... these are used by cromwell as a service
+* argument in workflow_params... should be string not struct
+* zip file for workflow_descriptor?
+    * workflow_descriptor... support zip file
+* 200 responses... everything response to this... some things we need swagger to tell 
+* credentials for downloading things