switch from the confusing special latestupdate value 'null' (the string) to 'getall' (the string), and clarify a comment in lib.php about what getall means
version bump
Version bump, shorten enrol_cvent_registration_guest.

enrol_cvent_registration_guest is too long, now it's
senrol_cvent_reg_guest.
prevent duplicate eventtitles in Cvent from bombing course creation
remove all ENUM attrs from install.xml
add upgrade to rename table