Can save and restore RNG state via new (serial) I/O routines in a NERSC header style file.
Store a Parallel (one per site) and a single serial RNG file.
Example of multiple levels in the WilsonFermion hmc test.
Merge remote-tracking branch 'upstream/master'
Conflicts:
lib/qcd/hmc/HMC.h
lib/qcd/hmc/integrators/Integrator.h
lib/qcd/hmc/integrators/Integrator_algorithm.h
tests/Test_simd.cc