v0.3.1-dev.2

[Unreleased]

Added

• Started a changelog based on keep a changelog
• Mean square velocity calculation via a compute shader that sums log_2 times; plan to extract into a general API in the
  future
• Added more options to graphs displayed in GUI like toggling on/off and clearing
• Added helper function for drawing graphs for values that update over time
• Added banner and icon for the project
• Grid toggle button under visual options
• Support for recent projects in web via local storage, plus "Save as" button to save projects back to disk

Changed

• Change project name references from 'Particles' to 'Particle HIVE'
• Decreased strength of wall repulsion to fix odd behaviour in 3d, as well as sticking to walls under certain force
  parameters
• Docs moved to a static site generator we have more control over

Fixed

• Prevent z-fighting in 2d scenes by rotating billboards upwards by a tiny angle