add questionnaire to fixture
add glossary and pages to fixture
merge format helper and converter helper
refactor page/folder identifier generation into the converters
refactor canvas_cc model to models
convert activities to module items
add module_id to moodle book and folder
exclude unsupported activités
move md5 id hashing to the converter module
write the identifierref for module items
add support for module items for other moodle2 activity types
add support for using at_xpath with parse_text
fix bug in moodle 2 file paths
remove id='main' attributes from html
convert books directly to pages
add new book to page conversion to migrator
convert links to files
add support for converting multiple types of activities
update links to other course content
Merge branch 'moodle2' of https://github.com/rivernate/moodle2cc into moodle2

ially if it merges an updated upstream into a topic branch.