WebGL and adjustments

This is the 1st update and its contents:

NEW:
A WebGL version that can be played on the browser

ADJUSTMENTS:

Guns:
Backfire Snipegun: Increased both damage and backfire damage
Basic Machinegun: Increased damage
Pistol Shotgun: Increased damage

Bosses:
Christmas Tree: Increased attack speed
Communist Star: Increased damage

Bombs:
General: Decreased number of bombs initially
Molotov Cocktail: Increased damage speed and decreased damage