SMB2 Improvement

Description

This is designed to fix a few small things without changing the game too much. List of Changes: * Restored the sound effect that's supposed to play when you die. It never worked due to a bug. * Restored the missing 8th animation frame for tiles. It was never shown due to a bug. * Swapped names for OSTRO and BIRDO in the credits. * Changed PRINCESS to PEACH in credits and "contributor" text. * Changed "PUSH START BUTTON" to "PUSH START". * Changed "PUSH (A) BUTTON" to "PRESS BUTTON". * Changed CLAWGLIP to CLAWGRIP in credits. * Changed HOOPSTAR to HOOPSTER in credits. * Changed TRICLYDE to TRYCLYDE in credits. * Fixed issue where doing a charge jump makes you throw an item. * Fixed POW graphics (The "O" was offset by one pixel in one frame).