Add Static Effect to TV

[webdesserts]

This pull request adds a "static effect" to the Antwar TV to make it appear that the tv is flickering on and off as if it has a bad signal

It is made in pure svg by generating a box of randomly sized lines. The box is then quickly shaken about the screen to try to bring the appearance of static being generated without actually having to randomly generate new noise for each frame. The animation is done entirely with css animations, and should fall back to the "title screen" when css animations aren't available.

[bebraw]

Poke me when you want a review. 👍

[webdesserts]

@bebraw It should be ready for review now!

[bebraw]

Great work. 👍