rest of Moodle. The convention for blocks is now:
class block_something extends block_base { ... }
HOWTO updated accordingly, plus some more minor polishing. More to come.
Code based on the work of Daryl Hawes for the blog module. Thanks, Daryl!
Please test the hell out of it as it's sure to have issues that need to be
ironed out.
Changed the way applicable formats for blocks are handled. The changes are
short codewise, but to grasp all the implications read the forum discussion
at the relevant URL.