Increase save_thumbnail_in_s3 time limit to 10 seconds
fixed dockerdev setup with cidfiles dir
Better way to read thumbnails

For some reason, urlopen() was hanging when handling HTTPS URLs.  The
requests library handles it much better, and also supports a timeout
option.
Increasing the timelimit for thumbnail task 1 more time.

I think this timeout makes more sense when we are also setting a
timeout for fetching the URL.
added eventlet for celery
added eventlet to reqs
Merge branch 'staging' into gh-855