fix space optimization
improve space optimization
don't add space for tiny gaps
todo
update manpage
..
clean code
..
..
Merge branch 'master' of github.com:coolwanglu/pdf2htmlEX
add --optimize-text; make --space-as-offse default
update manpage
improve text optimization
comments
working
optimize letter-space
still letter space optimization
make sure contents are cleared in TextLineBuffer::flush
embed-base-font should be default
todo