them as we go.

Lots of bug fixes.  Let the parser toss illegal character and
string literals.  Compile unary + correctly.  Allow float OP
ideal.  Compile unary * correctly.  Implement min and max float
values.

R=rsc
APPROVED=rsc
DELTA=64  (29 added, 7 deleted, 28 changed)
OCL=31811
CL=31814