Adding changelog to the website
doc: gitignore; ./build-website.bash --no-commit
Tune documentation
Remove most of the deprecated code

Closes GH #144
Add Python 3.4 build options
Python 3 compat: Improve various bits

This includes changes to WSGI, websocket, bytes/str/unicode handling,
SSL, backdoor, greenio and tests.

Some comments and conditionals (PY2/PY3) were added for clarity

GH issues:

Closes #106
Closes #111
Closes #118
Closes #141

Incidentally should also close #135 (reopen if didn't)

cc #6
Allow more gracefull shutdown of wsgi server

Currently, if the listening socket is closed the
wsgi.server will go into an infinite loop.

Add an 'is_accepting' flag which can be set to False
tell the server to exit. This allows, for example,
a signal handler to initiate a gracefull shutdown
(complete existing requests then exit).