travis: set NWORKERS=1 for pypy
disable test_urllib2net.OtherNetworkTest.test_ftp

too slow
test___monkey_patching: set timeout to 120s
resolver_ares.py: replace iterkeys() with keys() PY3
run bench_sendall.py on travis
greentest/util.py: better timeouts
bench_sendall.py: replace string with bytes PY3
server: fix do_read() enough to run bench_sendall() PY3
Update known_failures.py