good enough to parse some html.
in reader, add "comment" tag to collect
comment text.
do not allocate during Unmarshal unless pointer is nil.
R=r
DELTA=441 (416 added, 1 deleted, 24 changed)
OCL=35586
CL=35594
The lexer is the bottom level.
Most clients will use the Unmarshal method,
not yet implemented, which will behave like
json.Unmarshal.
R=r
DELTA=1115 (766 added, 219 deleted, 130 changed)
OCL=35316
CL=35339