Suggestions to make git easier to understand

Hello,

The other day I fell on this post:

http://raflabs.com/blogs/silence-is-foo/2011/04/07/staging-area-index-cache-git/

I thought it made some good points about git being kinda confusing,
for example sentences like "Changed but not updated" in git status
could use a better sentence like "Changed but not in the index". Maybe
--cached could have an alias like --index-only for things to be more
intuitive as well.

`git rm --index-only somefile` is more understandable than `git rm
--cached somefile` imho.

Also, in ls-files, --stage could maybe use an alias like --contents
for it to be more self-explanatory.

Philippe

p.s: not saying we should absolutly do what I suggest, but rather
start a discussion about how to make git's terminology more intuitive
and self-explanatory.