Fix a memory leak

Animate the flame shape with time

Improve performance by using 2D noise instead of 3D

I can't see the difference and I'm guessing 2D noise should be faster.

Fix flame artifacts showing up after days

Due to floating point precision problems the flames started to look
weird after some days. With this change in place, we just reset the time
once or place per day to stop this from happening.

Fix visual artifacts in the flames

Update marketing graphics

Merge branch 'johan/firier-fire'

This change makes the flames look a lot more like fire.

Make Activity Monitor show us as "LoadViz"

Before this change the name was empty in there.

Get closer to Apples icon guidelines

Improve idle performance

By only doing flames maths for pixels that can potentially contain
flames.