Set mood for soft slippers
Zen room -- partial rewrite

I made a bunch of changes, including:
* Zen room description should not mention the chair when it's gone.
* Folded some code together.
* Sitting in a chair gives a -3 attack modifier.
* Speech presented between quotes rather than in italics (for
consistency with other speech).
* Only talkers and not friendly people can be the chairinheritor.
* Changed chair inheritance to a single variable rather than a relation
-- the relation seemed overkill.
* Turned the after rule into a report rule, otherwise it stops normal
reporting.
* Chair shouldn't move when the chairinheritor is dead or off-stage.
* Chair shouldn't move when there is no path from the Zen room to the
location of the chairinheritor.