Added fortran interface for staggered fermion force.  Staggered force uses resident fields if available.  Lots of unnecessary debug info printed in interface_quda.cpp.
Updated cub to 1.1.1 release which should fix pre-Kepler compilation issues for clover inversion.
Fixed bug in strided displaced send receive for QMP back end.
Removed pre-Kepler workaround for clover trace computation, now safe to use CUB.
Merge branch 'tifr-redux' of github.com:lattice/quda into tifr-redux