Devlog 5 - I had added all requested features !

Firstly, I added the invert button and the drag and drop zone, it was quite simple. After that, I added the progress notification and tried to optimize the algorithm. It was not simple, I changed it to read only one time the image and not read for brightness and then another time for the drawing… I, also for the black and white version, drew not each character one by one but only after a line. It speed up the calculation time a lot.