request: add default user agent
Merge pull request #23 from segmentio/send/user-agent

request: add default user agent
travis: remove node 0.11
tests: use http.Server for faster tests
ocd
tests: prevent port used err
tests: fix tests, no clue how they worked before...
Return request instance from onend
Merge pull request #24 from segmentio/fix/onend

Return request instance from onend
Release 1.3.1
add initial .locked(key, fn)