Well, that looks nice and easy
Seriously though, the changes are really minor: just do a find 'raw_bitdepth' and all my changes are there (except for reverse_bytes_order() which is terribly hardcoded). If someone who's already setup can look through them it would be much safer than me fucking things up.
I think that quick way to share the code without any risk is, once installed hg, register yourself on bitbucket, go to magic lantern source and fork the repo, you will have your fork on bitbucket pubblic so any change you made will not screw anything in the ML source.
Once done the fork you have to download it on your pc (I use a GUI for managing those forks, SourceTree), make your changes and with "hg pull" update it on bitbucket.
When you are done with all your work you can submit from the fork page on bitbucket a pull request to the ML source, that way it will be reviewed before merging it.