Merge pull request #11 from maneframe/moodle2

parse/convert/write text only questions
add media, iframe, and label to backup fixture
add moodle2 label model
parse moodle 2 labels
add labels to moodle2 course activities
convert moodle2 labels to module sub headers
trim leading space for summary pages
parse the visibility settings for activities
parse/convert/write numerical question type