Dev-guide

[scrabsha]

It would be a nice idea to have some documentation that describe briefly how things work. This would make contributions easier for newcomers.

[cbonaudo]

Are you speaking about each mod specifically (eg: doc for git.rs, doc for glue.rs, etc...) ?

[scrabsha]

Yep! where each thing happen, how data flows between each pass, and so on.
Maybe we can take inspiration from Overview of the Compiler from the rustc dev guide.

[cbonaudo]

Created in #15, with a brief summary.
now we can expand each part to describe accurately what is done