Gen 1: Bug fix. Allow Bide with Substitute.

Allow Bide and other moves that target self with a volatile but 
have no damage to work correctly with Substitute.
Gen 1: Add flinch chance to Low Kick

Low Kick in gen 1 has a 30% Flinch rate.
Merge pull request #184 from Joimer/patch-8

Gen 1: Bug fix. Allow Bide with Substitute. Add flinch to Low Kick.