Add a benchmarking suite for matrix.
cleaned up formatting in matrix.rs in both test and bench
Add travis support for bench build.
Pad out the benchmarks to make the performance difference more pronounced.
This also speed the benchmarks up since the bench suite has trouble with
benchmarks that less then 100ns in length.
Merge pull request #10 from csherratt/bench

Add a benchmarking suite for matrix.
update to compile on latest rustc