htmltokenizer: get rid of some redundant checks
htmltokenizer: simplify char ref end state
+ some other small code quality improvements
htmlparser: small improvements
* remove unnecessary stringify + function
* remove test artifacts
* update chagashi submodule
* add test to skipDirs
minidom_cs: switch to chagashi
Reorganize tests
not willing to put up with nimble any longer, makefile it is.
htmlparser: simplify a bit
Remove parse error callback
It never worked properly, it's under-specified, and I don't need it.
entity: reduce size somewhat
with GCC this shaves 64K off the output