Added BattlePokemon#isGrounded to check for the grounded-ness of a
Pokemon. Also BattlePokemon#isSemiInvulnerable for whether a Pokemon is
in the first turn of a two-turn move that makes them semi-invulnerable.
Fixed Terrain bugs involving Pokemon in a semi-invulnerable state.
Changed OHKO move check to use BattlePokemon#isSemiInvulnerable, fixing a
graphical bug that would display an immunity message when a Pokemon
attempted an OHKO move on a higher-leveled Pokemon that was being held by
the effect of Sky Drop.
Fixed Misty Terrain bug that was causing Rest and the effect of Yawn to
put Pokemon to sleep.
Fixed Misty Terrain bug that was causing Yawn to fail.
Fixed Electric Terrain bug that was causing Yawn to succeed.
"Sheer Force should eliminate Life Orb recoil in a move with secondary
effects" would always pass even with wrong implementation because the
Sheer Force Pokemon being used was not holding a Life Orb.
Added tests related to Mummy to Sheer Force and Rock Head.
- Streams are merged to make sure that all errors and warnings are reported.
- Adds dev dependencies: `merge-stream` and `lazypipe`.
- Tracks a fork of `gulp-jshint` to fix https://github.com/spalger/gulp-jshint/issues/88
