Added forward VSH_OnHaleNext and blocked Festive Bonk! Atomic Punch.

Adding a forward to be called when the "You're hale next" panel is displayed to the player.
Blocked Festive Bonk! Atomic Punch (changed to Crit-a-Cola, identical to regular Bonk).
Successfully compiled and tested.

EDIT: Fixed the Travis file, Asherkin's URL changed to https protocol and caused the build to fail.