Update README.md

Update README.md

Update README.md

improve rendering

add sqrt and improve suffix and exponent rendering

use Canvas>>drawString:at:font:color: instead of text morph

changed way to parse the tokens into image

fix class comments

add baseline

white background instead of transparent (because form canvas renders a blurred text on a transparent background)

white background instead of transparent (because form canvas renders a blurred text on a transparent background)

add class initialization to MicroMath inline block

add fix on Microdown inline parser

implemented image processing

add internal tokenizer and tests