* Implemented click handler for buttons
* Added Time_human() to convert seconds into hr/min
* Implemented windows object that encapsulates access to window elements
* Added windows_management object that opens/closes windows
* Added filters for specific task types
* Added catagory object to switch between task displays
* Implemented Draw page/task/goal_list functions
* Implemented Time_accumulated/Task_completion/category_left/category_right functions
* Added Create_task skeleton
* Added onload functions to hook buttons and start page load