Fix: monster(silverfish)_eggs now use fuzzy matching so monster_eggs@stonebrick will work, etc.  Fixes #212.
Add: sound action now supports range for volume and pitch & {sound1, sound2, etc} format.

* only basic { } support with equal chance of any value being selected
* example: sound: {anvilbreak/0.8~1p/0.9v, catmeow}