added some comments to understand Termdiff better
added documentation on usage, internal structure and alternatives
more alternatives & links
updated the code to look like a code block in markdown
more markdown cleanup for readme
added a simple gitignore
Merge pull request #11 from jedi4ever/gitignore

added a simple gitignore
Merge pull request #10 from jedi4ever/extradocumentation

Extra documentation for people to understand the usage