Create README.md

This is a simple WinForms application to combine many images into one. 

The basic usage is the user selects a target directory that contains images and a directory where he or she would like the combined images to be placed.

The user then should hit the Tile Images button, and the images should be combined into one. The images are cropped and squared off if they are not already square.

The initial version creates 256x256 tiles with no limit to how many the user can select, the program will attempt to use all files in the target directory. The initial version also saves images of each intermediate step of combination.

This is a tiny side project created in an afternoon for a very specific purpose, but I thought it might be useful to others and I thought I would share it.

It's my first project on GitHub.