Add internal asynchronous BEAGLE implementation option for testing concurrent kernels and memcpy on newer CUDA devices.
Add internal asynchronous BEAGLE implementation option for testing concurrent kernels and memcpy on newer CUDA devices.

git-svn-id: 67bc77c75b8364e4e9cdff0eb6560f5818674cd8@6244 ca793f91-a31e-0410-b540-2769d408b6a1

svn2github/beast-mcmc,svn2github/beast-mcmc,armanbilge/BEAST_sandbox,svn2github/beast-mcmc,svn2github/beast-mcmc,armanbilge/BEAST_sandbox,armanbilge/BEAST_sandbox,svn2github/beast-mcmc,armanbilge/BEAST_sandbox,armanbilge/BEAST_sandbox