[PATCH 2/2] README: Update dependencies

[Jason A. Donenfeld]

On Thu, Jan 9, 2014 at 8:30 AM, Lukas Fleischer <cgit at cryptocrack.de> wrote:
> We depend on Git in the test suite. Maybe this should be changed to use
> the binary from the Git submodule instead?

I think we discussed the possibility of this a while ago with John.
This would make most sense to me, though we are using git's test
harness, and I'd like to avoid making invasive changes in that, if
possible.

In either case, I wouldn't consider the test case a hard dependency,
and so I'm okay with removing git from the dep list. Or changing it to
"Git 1.8.5 (included)" or similar.