Fix a bug where we were compressing wrongly
Parallel version of KMeans

See #13.
Parallel version of MolDyn

See #13.
Parallel version of MonteCarlo

See #13.
Parallel version of RayTracer

See #13.
Parallel version of Lire

See #13.
Parallel version of Duke

See #13.
Fixed a data race with RayTracer

When we run things in data-parallel since we cannot guarantee arrival
order. So we have to be careful on things that depend on arrival order.

This solves the race condition that we were seeing.

See #13.
Change the number of processors to 4

It is more reliable to use our old machine with 4-cores to do the timing
measurements than to use Amazon's 8 virtual cores. It is not clear
what these virtual cores translate to.

See #13.
Parallel version of Jbzip2