add testfile to .info
try catch on methods that throws exception
added frontend web- and unit-test
remove test output and rename function
correct filename
delete old file
check for isbn before ajax
dependency to bibdk_provider
delete outcommented lines + comments
rename method update->get
rename method update->get
cleaned out info file
implemented set_rating + refactored to use pid instead of ISBN
added pid in variables array
implemented update rating ajax + added throbber while waiting
parsers for various responses
use pid and not ISBN in html
adjusting test
added exception classes
work in progress