Adds Mouse Trail Feature

[llaver]

Mouse Trail

• Adds new config dropdown: Mouse Trail Style
• Adds 4 options: NONE, ENABLED, SYNCED, PARTYMODE
• ENABLED by default
• Adds Curve and Interpolate helper classes
• Adds mouse trail plugin and overlay classes
• Bumps RL version

[llaver]

Also I still don't like many of the comments lol.

I can not bear to remove them, you must do it.