Added message case for -ability when Cloud Nine or Air Lock activate

The server-side code is changing soon to have Cloud Nine/Air Lock
broadcast '-ability' instead of '-message', so we need to add the relevant
messages to the client-side as well.
Merge pull request #252 from ascriptmaster/master

Added message case for -ability when Cloud Nine or Air Lock activate
Changed message for Mummy to be more clear

When a Pokemon's ability changes because of Mummy, it only quickly shows
what the ability was formerly in a small box on the screen, instead of an
in-game message. We use parentheses for messages that don't actually
appear in-game, so Mummy's message is changed to use parentheses instead.
Merge pull request #253 from ascriptmaster/master

Changed message for Mummy to be more clear