unit test data updated
updated capitalization of sortCells() and updateMap() methods
added a few 'const' modifiers to calcTexture's interface to safeguard against mistakes
removed a few print statements
the data used in this unit test actually results in 4 cells being recognized by the software
added a few 'const' modifiers to findCells's interface to safeguard against mistakes
added a few 'const' modifiers to analyzeCells's interface to safeguard against mistakes
added a simple print method to the analyzeCells unit test, to be able to quickly look at a result that you can make sense of.