Add dragaxis attribute to dragstate
Only measure the width if text.measuresize, fix resizing when the multiline attribute changes
Fix inline datasets
Fix https://github.com/teem2/dreem/issues/4
first pass on interactive documentation. contains two hard coded placeholder lessons, an editor that has not been configured yet at all for html/dreem, and has not been made to automagically render changes as the user makes them - there is a render button instead. tested in chrome