The test file greater-london-140324.osm.pbf is 404

[paulmach]

The test pbf file defined in decode_test.go is now 404 Not Found on google drive.

From my PC:

> curl -I https://googledrive.com/host/0B8pisLiGtmqDR3dOR3hrWUpRTVE
HTTP/1.1 404 Not Found
Content-Type: text/html; charset=UTF-8
Content-Length: 1594
Date: Sun, 16 Oct 2016 23:42:09 GMT
Alt-Svc: quic=":443"; ma=2592000; v="36,35,34,33,32"

I have a copy on gist.github.com

As a corollary, downloadTestOSMFile should exit if resp.StatusCode != http.StatusOK