gateone.py:  Updated to require Tornado 3.0.
gateone.py:  Numerous Tornado 3.0 fixes.
gateone.py:  Separated the code that generates a new 10server.conf into its own function, generate_server_conf()
gateone.py:  Moved the combine_js and combine_css logic into separate functions inside utils.py.  combine_javascript() and combine_css().
app_terminal.py:  Fixed a bug in kill_session() where it just plain wasn't working.  This should close issue #231