"install-example-plugins" split to files/conf
add a default "all_slots" so plugins can
add support for "all_slots" in plugins

This lets a plugin automatically provide a hook
for all slots. Not much the plugins can do with
this aside from logging, since they can only
expect a BaseConduit
Add test case for 'all_slots' plugin property

Some test refactor/rename
log and plain 'raise' exceptions in run()

Just reraising get's us a more useful traceback.