HTML Changes Only

Enhancements:

- The HTML loading screen now has a progress bar.

- The in game pause menu now has a Fullscreen button to force fullscreen in your browser.  This only shows up on the HTML version.

Performance Improvements:

The following changes will reduce shudder caused by first time shader/material compiles during gameplay on HTML version.

- all the projectiles materials/shaders (Helicopter bullets, AA Gun bullets, Fighter bullets, Cruise Missiles, and Bombs) now get compiled on the intro screen. 

- The projectile impact GPUParticle effect shader gets compiled on the intro screen.

Since only the HTML version was changed, I kept the version numbers the same.