Merge pull request #1 from plasma-umass/master

Back-fill updates from PLASMA repo.
Merge pull request #2 from plasma-umass/master

Latest updates on plasma fork.
Merge pull request #3 from plasma-umass/master

Updates for 64-bit; fixes for reported bug on Ubuntu.
Merge pull request #4 from plasma-umass/master

benchmarksNda
Merge pull request #2 from emeryberger/master

Updating plasma-umass forks