prototype/initial version of the concurrency functionality using a tornado server
the only functionality currently available is the active user list and node locking
added a tornado_main file for development that currently holds all the tornado specific code
two api's currently exist in the tornado code: an api for locking nodes and an api that handles the long polling and update/event serving
a form that validates requests to lock nodes was added
added django auth back to template context processors in the settings so auth user data is available in in the template - this may be temp
added requestcontext back to views and specifically to system_map for the auth user data - may be temp
added js to handle long polling requests and node locks
added relevant html to display the currently available concurrency functionality
changed the display none inline styles in the html to hidden attributes instead
made some misc 80 char line length changes