simple-thresholding: Add method to set image without Otsu thresholding
simple-thresholding: Refactor tests(remove 'let's)
simple-thresholding: Add tests for new functionality
simple-thresholding: Refactor tests. Add new tests for simple thresholding
simple-thresholding: Fix scale for thresholdedImage and drawBlocks
simple-thresholding: Implement delegate-based custom thresholding. Fix tests.
Merge pull request #115 from BamX/simple-thresholding

Broke out delegates, added delegate for custom thresholding.