Bring up to date with latest rustc 0.10-pre.
Update README.md

Ohloh doesn't show up
Update README.md

Remove Ohloh integration. It does not show up correctly.
Refactor slightly
Merge branch 'master' of github.com:mneumann/rust-toml
Refactor lookup. Maybe revert again as complex
extern mod -> extern crate
Remove recursion for lookup()
Remove vector pattern
Fix testrunner
Get rid of warning
Change crate_id to full github path
fix type: create -> crate
Replace MemReader with BufReader.

BufReader operates on a borrowed vector, which is all we want here.
Unsigned -> PosInt, Signed -> NegInt
Remove unnecessary ~ on HashMap

There is no reason the HashMap should be a unique pointer. It works just
as well as a direct value. And this way Value can derive Show.

Derive Show instead of ToStr.