Add ascii package test cases

Add ascii package test case

Update the example

Add testify package for testing

Fixed a slice allocate issue

Update README.md

fixed the go lint issue

Rewrite the go docs

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

Update README.md

add single gif

Update README.md

Add demo gif file

add demo file

Update README.md