first attempt at tkinter interface implemented.
* cell sampler now saves cells in individual files rather than all DNA strings thrown into one file.
* cell painter added which does not yet work, but is serving as a mockup currently
* drawColors logSetup bug fixed
* cell class can now be initiated with a given DNA string
* added setCell method to cellList class
* environment __del__ method added to ensure proper exit & save every time
* PIL dependency added to readme