The Dark Matter Update

This is the first "larger" update for Galaxy Engine. This update was made with the objective to implement actual dynamic dark matter. This allows disk galaxies to easily maintain their spiral form. The update also adds some fixes and some smaller new features

Changelog

-Dark matter is now simulated through particles, unlike the old "attraction to the center" method

-Dark matter is now on by default

-Changed the initial conditions of the big and small galaxies to give them a more natural look

-Added big bang creation feature

-Added basic star creation feature

-Added Show Dark Matter particles button

-Removed old dark matter model

-Added new Density Size visuals

-Fixed trajectory prediction so that it better maintains conservation of energy

-Fixed an bug in the quadtree construction that caused the program to crash when compiled for linux

-Domain size has been doubled

-Removed Pixel Drawing button

-Fixed bug that prevented subdivision if the amount of particles was exactly at the threshold