Updates /app/herm and dependencies to work with latest dill, and
rewrites the entire webterm frontend to use xterm.js for rendering.
Webterm code needs a bit more work. Its subscription handling might
want to be moved out, it needs to handle resizing, react to landscape
theme changes, etc.
* jb/motion:
pill: solid
zuse: remove %crud from vane-task
arvo: full vane names in $sign
aqua: build again (still broken)
arvo: reform of the scry reform
This was a little bit too crummy. Instead, we put in a placeholder of ~,
which should be forwards-compatible with atomic session identifiers,
where ~ identifies the default session.
Additionally touches up the herm wires/paths to stick to the above more
closely.
Listens to the default dill session and passes its %blits on to
subscribers. Passes any %belt pokes it gets into dill.
Updates webdojo to make use of it, which is the primary motivation for
herm's existence.
