At task status color

Renamed the file "completeTask.js" to "taskStatus.js" so it can hold more general task status items. 

Added global variables for task status colors to top of taskStatus.js so colors can be changed easily and quickly throughout the code. 

drawMainRect() on events.js now checks for status before choosing fill color. 

Starting task updates status to "started" and changes to blue, complete changes status to "complete" and changes task to green. Not started is still the old gray. 

Not done is "delayed" but it is tied to the timer which is another branch so is not included here.