Merge pull request #313 from chrox/master

adjust font sizes in credocument according to screen dpi
Merge pull request #316 from chrox/master

fix JSON parser on some rare utf8 representations
Merge pull request #319 from chrox/master

save cre3.ini on closing each credocument
Merge pull request #322 from chrox/master

add gotoLocation for credocument
move configurable to Document class

since every document type is depend on it now
add pic document type
style cleanup in document.lua
Merge pull request #324 from houqp/houqp-master

add pic document type for jpeg
Nicer close button, solves #321.
Merge pull request #325 from giorgio130/master

Nicer close button, solves #321.
export highlights only if highlighted text is not nil