Removes bitrotten tests
Changes mpiMcmc to singlePopMcmc

This reflects the fact that we no longer use MPI in singlePopMcmc.

This doesn't change the names of the files themselves (still TODO), but does change the name of the binary
Removes inclusion of iacamarks from noBinaries
Moves call to log() out of WD numerical integration loop
Sets random seeds by default in singlePopMcmc and multiPopMcmc

Maintains the ability to specify a seed from the command line