update gitignore file to ignore files in test directory
change cache size to 10 MB
save model information for later retrieval
enlarge hightlight box in readerhightlight.lus
OCR is almost stable, so enable it now
init/free OCR engine when necessary
dict windlow fit to landscape screen width
add word lookup with stardict
add sdcv in customupdate
add env variable for stardict dictionary dir
add missing sdcv
Merge pull request #89 from chrox/add_stardict

add a dictionary backend stardict