make S3 key ID and S3 key optional for s3tee
Merge branch 'master' of github.com:datacratic/soa
fixed unparsable http output
fixed problem with wrong upload being found when looking for in progress upload (when there is one with a prefix of the current one)
Merge branch 'master' of github.com:datacratic/soa
ZmqNamedMultipleSubscriber's message loop no longer uses epoll.

This was causing problem if it ended up as a child of another message
loop. When queried it would wait for an event to show up and would
therefor block the entire message loop.
added .swp files to .gitignore
Removed superfluous call to MessageLoop::init() in loop monitor.
s3 credentials can now be read in environment variables
Merge branch 'master' of github.com:datacratic/soa
Merge branch 'master' into endpoint-add_timer
further debugging