Doubled the number of message handles for message handling, but still getting errors
Updated clover field to use bufferPinned[0]
Merge remote branch 'origin/quda-0.7' into quda-0.7_dslash_bug

Conflicts:
	lib/lattice_field.cpp
getFatLinkPadding in the milc_interface is now compiled even when staggered fermions are not used
Added resetComms static member variable to lattice field to
ensure that pinned buffer pointers are reset after resizeBufferPinned is
called. Still getting a segmentation fault, however.
LatticeField now versions each resize of the pinned buffer, with cudaColorSpinorField messange handlers now reconstructed conditionally using this version.
Merge branch 'quda-0.7_dslash_bug' into quda-0.7