* now when rendering in page view mode, we only keep track of page
number instead of pos inside document. Because using pos inside
document for page view mode is really a bad idea and will lead to
many unsovlabe bugs...
After set font in ReaderFont:onReadSettings, we have to send UpdatePos
event in order to set m_is_rendered(member of LVDocView) to true.
Otherwise position inside document will be reset to 0 on first view
render, this makes the first page of document is always displayed on
document open.
So far, I don't know why this call will alter the value of m_is_rendered.
It just works...
Don't try to register the two fonts Dingbats.cff and StandardSymL.cff
with crengine because it will reject them anyway. But we cannot simply
remove these two fonts because they are used internally by mupdf to
emulate "builtin" fonts which are mandated by Adobe PDF specification to
be present in every valid implementation.
a bit of cleanup, switched width/height combo over to use
Geom() objects, moved framebuffer handling to Screen object,
callback syntax sanitizing, lots of small changes
