Bunch of minor changes:

-Abilities can now be trained with the +train command.

-Shops can now specify discounts by character in addition to organization. Character discounts take precedence. Discounts can be negative for raising prices to those who annoy you. Specifying a discount of 0 removes it.

-@clues now gives a list of anyone you've shared the clue with.

-+where accepts arguments to filter results by any name provided in a comma-separated listed.

-Tweaks to @bb formatting for post announcements and the overall list.