codespeed/tools/save_single_result.py with exception catching

catching urlopen exceptions

    try:
        f = urllib2.urlopen(SPEEDURL + 'result/add/', params)
        response = f.read()
        f.close()
    except urllib2.URLError, e:
        if hasattr(e, 'reason'):
            response = '\n We failed to reach a server\n'
            response += ' Reason: ' + str(e.reason)
        elif hasattr(e, 'code'):
            response = '\n The server couldn\'t fulfill the request\n'
            response += ' Error code: ' + str(e)
    print "Server (%s) response: %s\n" % (SPEEDURL, response)