add document language option in config dialog
Document language setting is used for better text extraction and OCR.
add Translate button when selecting multiple words
bugfix: fix invalid auto page cropping
word gap is set to smallest when selcting CJK languages
Merge pull request #163 from chrox/ocr_language

add document language option in config dialog
factor out buttontable as a vertical group
update framecontainer dimen in paintTo function
refactoring using updated dimen
refactoring using centercontainer in button widget
add multi-dictionary support
bugfix: update width of dict window in readerdictionary
Merge pull request #164 from chrox/multi-dict

add multi-dictionary support