Modified grid and manualGRID to allow for the track/type colour difference switch.  Added the count to the grid.
Modified Postgrid and Postgrid-wide to have the count of attendees per class.
Modified index to be Presenter/Volunteer login, instead of Presenter/Vendor login.
Modified Postgrid and Postgrid-wide to show duration better.
Modified validation_functions, db_functions, data_functions, and RenderEditCreateSession to work better with the first step toward moving the descriptions into the Bios format.
Modified email_functions to accomodate the substitutions, as opposed to having them hard-coded
Updated SubmitEditCreateSession to report the sessionid created.
Modified SubmitCommentOn to put the CommentOnSessions in the right database.
Modified SearchMySessions to allow Programming Volunteers to pick which class-elements they want to volunteer for.
Added first run of NoteOnSession to add notes on sessions for quit voting purposes.
Updated StaffSendEmailCompose and _POST to deal with the schedule correctly, the full schedule, and the bios.  Need to probably collaps the two of them into one set of functions so there isn't so much duplicate code between them.