param: spelling nit
common: consolidate system header includes into common.h

Hopefully this will prevent random compile failures in the future from missed
cmath, climits, or memory.h includes.

--HG--
extra : amend_source : fa08f9553cc56cbd4bf54054efa31079118bb45f
cleanup the labels in assembly code with trailing colon
C primitive for blockcopy_ss
Testbench code for blockcopy_ss
param: print vbv-init as a float