- caseify parser functions (all but a few should not be exported) - more elegant tracing code - removed some dead code, cleanups
- caseify parser functions (all but a few should not be exported)
- more elegant tracing code
- removed some dead code, cleanups

R=r
OCL=24452
CL=24452

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go