Add feature for bulk running multiple .ior files

[GoogleCodeExporter]

Vision:

1) File -> Bulk Submit...
2) Multi-select file dialog
3) Show dialog listing files being submitted with http status and time (submit 
requests and update GUI with feedback asynchronously). Allow individual request 
cancellation. Possibly use Green and Red colors to indicate successful vs. 
unsuccessful responses. Allow user to drill into details of individual 
responses (possibly we can open the responses in instances of the Response Pane 
shown in a dialog, not forgetting to provide features like "Export Response 
Body" somehow).

Extra possible features: 
a) bulk export response bodies.
b) bulk abort all requests.

Original issue reported on code.google.com by stephen....@gmail.com on 27 Jun 2013 at 8:02

[GoogleCodeExporter]

It would be great to be able to queue multiple request somehow. Either through 
the use of the multiple files, or to have multiple request written at once 
(which would require for the URL to be specified as part of the request.

Original comment by even.ho...@gmail.com on 21 May 2015 at 4:08

[GoogleCodeExporter]

An even greater feature of running bulk would be to extract parts of the 
response, and use this in the next request, but this would most likely require 
too much of this tool.

Original comment by even.ho...@gmail.com on 21 May 2015 at 4:10