fix package for 13.10
Merge branch 'master' of github.com:coolwanglu/pdf2htmlEX
clean js
support hashchange
..
clean js; all position are now in scaled coordiante system
maintain first visible page
..
..
fix loading indicator
fix animation
..
fix css for loading indicator
add CONTRIBUTING.md
Update CONTRIBUTING.md
update readme
Merge branch 'master' of github.com:coolwanglu/pdf2htmlEX
update README
udpate docs
Update CONTRIBUTING.md