* Create report dir before reading POST body
... so that we can stream uploaded files straight to disk, instead of reading
them into memory first.
* Add support for attaching files to reports
If a 'file' parameter is provided, save it as a file on disk. Also include a
link to it from the github issue.
current riot-android stuffs everything into the 'version' field; I don't really
want that ending up in the github issue (especially the mxid), and I don't want
to have to wait for an update to riot-android to land, so let's unpick
it into 'data'.
