moved date parsing to application controller
added unit and lecture models; basic functionality for units
corrected jquery timer
additions to lecturs and units; formatting for lectures
work on powerpoint jquery plugin
added comment and lecture_question models
reorganized css files
adjusted powerpoint plugin appearance and disappearance
added views and controllers for comments and lecture_questions
adjusted schema for comments and lecture_questions
adjusted layout files to match css reorganization
added helper for lecture questions
added lecture questions response
added association for comments to user
additions to js for lecture formatting