Add par_vec, `ParVec` concurrent vector wrapper
update iterator types and fn pointers to Rust master
Move `extern crate test` to #[cfg(test)]
Merge pull request #41 from alexcrichton/cfg-test

Move `extern crate test` to #[cfg(test)]
Merge pull request #39 from apasel422/fixes

update iterator types and fn pointers to Rust master
Merge pull request #21 from cybergeek94/master

`ParVec`: A vector that allows concurrent manipulation of non-overlapping slices.
0.0.7 release
Merge branch 'master', remote-tracking branch 'upstream/master' into fix-lru-remove