Add "Compression" section

[kamilmysliwiec]

I'm submitting a...

[ ] Regression 
[ ] Bug report
[ ] Feature request
[x] Documentation issue or request (new chapter/page)
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Expected behavior

As a user, I would like to see Compression section

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Environment

For Tooling issues:
- Node version: XX  
- Platform:  

Others: