Insertion Sort & Delay Slider

Added the code for Insertion sort.

Added a delay slider to control delay in milliseconds.

Ideas/To do:
-add a pause button which sets the delay to maximum and add an if
statement in SortThread to delay indefinitely while at given value
-add more colors to Colors enum, and add a legend to describe each(?)
-have the system run the sorts once without delay to compare time
elapsed (?) perhaps via a separate button
-add a textbox to each JPanel to output each step including final sort
order and steps required (using a counter)