Added Python 3 support for pdf2john
Changed is_meta_data_encrypted to return a boolean rather than a string
Changed get_encrypted_object_id to get_object_id in order to get any object id from the trailer
Impemented parse meta method, just get values methods left
Fix for checking meta data encrypted in python 3.2
pdf2john now gets the title and year created from xmp metadata
pdf2john now gets all relevant metadata when metadata left unencrypted
Fixed bug in pdf2john where wrong objects could have been used
Small fix to get_xmp_values method in pdf to john