Got rid of call to exchange_cpu_sitelink_ex and loadLinkToGPU_ex and
storeLinkToCPU in computeKSLinkQuda.
Fixed a bug in the single-GPU HISQ fermion force.
Changed updateCoords function so that it will work in single-GPU runs
that don't use padded fields.
Removed call to loadLinkToGPU in the single-GPU build of computeKSLinkQuda.
Changed computeKSLinkQuda to extend the field using copyExtendedGauge.
This also involves a change to the milc-interface code and temporarily
breaks the hisq fattening test.
llfat_test seems to work with changes to computeKSLinkQuda.
unitarize_links_test compiles but hangs.
computeKSLinkQuda works in the single-GPU build
Fixed bug in the single-gpu hisq force.
Fixed the gauge order in hisq_paths_force_test.cpp
Replaced loadLinkToGPU with cudaGaugeField::loadCPUField.
Got single-GPU build of hisq_unitarize_force_test working.
Got rid of loadLinkToGPU_ex and exchange_cpu_sitelink_ex
in multi-GPU build of hisq_paths_force_test.
Added computeHISQForceQuda to QUDA's interface.

Should be able to merge this with computeAsqtadForceQuda
later.
Polished some of the profiling in computeKSLinkQuda.
Merge remote branch 'origin/tifr-redux' into tifr-redux