Add version matrix to Readme
Temporarily Remove Travis

Travis builds have been broken for ages, removing the badge and
git hook until the issue can be sorted out.  Tests are still running
on our internal Jenkins CI server, which we should be making
public in the near future
Provide response body when exceptions are ignored

Normally, exceptions are thrown on HTTP errors (404, 500, etc).
If the user chooses to ignore these exceptions with the `ignore`
parameter, the response body was entirely empty.

This commit returns the full response body from the server so that
the user can parse it as required.