Added emulated WSGI development server.
Added executable flag to bin/wsgidev.
Added auto-merging of os.environ into emulated WSGI environment.
Added extra environment variables for WSGI emu.
Added ability to use threading or forking in wsgi.server.
Fixed some issues when closing sockets.
Fixed issue when populating PATH_INFO in environment.
Moved logging levels a bit so that it makes more sense.
Removed unused imports in wsgi.server.
Added error handling in socket.shutdown.
Added wsgi.server tests.
Merge pull request #6 from overridelogic/feature/http-server

Emulated WSGI development server implementation