Updated spawning algorithm.

Spawn patterns are now spread evenly across the unit circle.

Also removed 'rank' display from world map state, as this is obsolete.
Improved spawning algorithm so same enemies don't always spawn next to
each other.

Also re-tweaked world 1 levels.
Made first boss easier on normal mode.
Fixed bug so boss no longer takes forever to respawn on death in main
game.
Added expiration timer to multiplier powerup.
Added fullscreen and mute toggles to main interface.
Tried to clean up the main interface a bit more.

Not 100% happy with it.
Numerous tweaks to worlds 2 and 3.

Negligentia's arms now properly telegraph.
Additional small tweaks to world 3 and 4.
Moved fullscreen and mute buttons from main interface.

They are now in title screen and pause menu.

The reason is we don't want any click targets on main interface, since
player will be clicking everywhere.

Also re-enabled F and M hotkeys, and made options respond to pressing
them.
Made hover colors of menu buttons better.

Good use of my time.
Remove extraneous quests.
Updated minified JS.

Also removed Google analytics. It was conflicting with the minified JS.