Merge branch 'release/v0.1'
Player can't leave camera fustrum.
Weapon direction is no longer based on model rotation.
New enemy model.
Player can't leave camera fustrum.
Enemies only shoot if they are visible in the camera frustum.
Added enemy formations.
Cleaning assets.
Added new enemy type.
Projectile has appropriate lifespan so it won't circle the world forever.
Almost done.
Added few more enemies.
Competition is over.
Fixed enemies difficulty.
Additional input method.
Pooling more objects.
Reverting project.