Nodes to change projectile behavior#751

What it says on the tin: nodes that change or affect how projectiles behave. Such as:
-Larger AoE for exploding projectiles
-Tracking of enemies for automatic weapons
-Denser projectile count on scatter
-Adding scatter to a non-scatter weapon

While we already have different weapons for these different projectiles, allowing the player to customize exactly how their weapons behave would go a way’s towards making the game more fun.