rgb888 to rgb565 image converter for Adafruit GFX Library

Takes an input of rgb888 coded images to rgb565 images for AdafruitGFX sprite formatting convention in python script. converts to symbol coding, one letter consists of one rgb565 color.

##Image Input example

-> RGB Image -> .png format

##Converts to:

000000000000L 00jkkkjjjj00L 00lmlllnnn00L 0llmlllllnn0L 0llmlllllnn0L 0llmloollnn0L 0llpooollnn0L 0lppoooqlnn0L 0lpooooqlnn0L 0looooqqlnn0L 0looqqqllnn0L 0lqqqqlllnn0L 0llllllllnn0L 0llmlllllln0L 0llmllllllj0L