porting WebGL for EnemyBullet except for EnemyBeam.
Porting WebGL for Item.
Porting WebGL for Bullet.
Porting Fighter and FighterOption to WebGL.
Porting Boss to WebGL.
Porting Enemy to WebGL.
Porting Bomb to WebGL.
Moved VanishedEnemy and DamageEffect to Effect.
Merge remote-tracking branch 'origin/master' into gh-pages