Fixes to a couple of recent commits
Add EventSource WSGI handler
Port RWS to gevent
Change a couple of titles in CWS

Make the task name more prominent.
Add a backdoor.
Add OII 2013 to testimonials list
Fix a couple of commands in the documentation

The dash changes the working directory to the home of the postgres user,
avoiding some "could not change directory" errors.
Fix incorrect getaddrinfo() usage (fix #199).
Fix backdoor
Use a temporary index number also on unchanged tasks.
Proper indentation.
Increasing the time limit of the communication test.

In some testing environment it caused problems.
Pep8.
Use only new-style classes.
Changed JSONDecodeError to ValueError.

It is needed after moving from simplejson to json.
Adapt some pydoc to the correct format for raises.
Changed class to type when appropriate in the pydoc.
Timestamps are now in datetime.
Digests are really unicode strings.
Some pylint fixes.