Fix OpenMPI not recognizing MPI_UINT32_T datatype


git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2891 41b19578-b77a-4e3b-9682-c8570d237623
Add some documentation about the separated IP operator optimisation.  I modified the last worked example to demonstrate it as well.

git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2894 41b19578-b77a-4e3b-9682-c8570d237623
Make runtime noise generation for distributed-mpi simulations compatible with older MPI libraries.

git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2895 41b19578-b77a-4e3b-9682-c8570d237623
Fix compatibility with c++11, needed for OS X Mavericks.

git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2896 41b19578-b77a-4e3b-9682-c8570d237623