re-encoded only used glyphs

detect duplicate base fonts when embedding

take care of spaces (simulate by <span>)
use absolute positioning for long whitespace

fix glyph width as provided in pdf

disable selection if we know unicode is wrong

==Future==
multiple charcode mapped to a same glyph
check if we can add information to the font, and let browsers show ligatures automatically
custom html/css dir
native support for image
native support for draw