Intellisphere v2 alpha

Version 2 is now out, which you can try out in your browser.

Notable changes:

• New skybox with physically-based atmosphere shader, that changes based on your current altitude.
• More HUD elements - altitude, weapons and mission timer indicators.
• Enemy radar lock and missile detection system, with visual alerts and loud beeping noises.
• Basic ground target "radar site" is now available.
• You can now taxi on the runway.
• Camera shakes when you receive damage.
• Aircraft leaves trails when making tight turns.

Under the hood changes:

• There is now a better sound primitive for better control over 3D sounds.
• Reworked AI system to have better sense of the environment (they still crash into the ground sometimes, but a lot less),