provide more vertical space for pane layout prefs
initial work on learning pane
serialization functions for learning module
show/hide learning pane
add title and directory to learning state
map directory to learning pane
derive pane title from document head
help handlers for learning content
use file query param for learning help requests
integrate reveal.js
correct url for learning pane
move learning state to it's own translation unit
rename learning state
make dcf parser interface more flexible
initial work on slide parser
slide parser
first pass at slide rendering
remove slide parser test rig
derive title from first slide
add refresh command