Added SIMD lanes to register file and ALU.
Remove unnecessary template parameter.
About half-finished.
Fixed up predicate IID bits for SIMT operation.
Finished scoreboards, functional units.
Finished updating harmonica pipeline generate func to support SIMD execution.
SIMD writeback seems to work.
Added in-flight instruction counter.
Updated in-flight operation counting mechanism.
Merge branch 'simt' of https://github.com/cdkersey/harmonica

Conflicts:
	funcunit.h
	harmonica.cpp
	regfile.h