include potentialParent parts in MoI calculations.
Don't show GUI during the scenes switch
don't disable the pluging after every load.
fix NRE when there's no parts (introduced when ACoM was added)
fix exceptions when plugin enabled without parts.
make calcDimention a extended method so I can use it in both VectorGraphic and TorqueCircle

Conflicts:
	LineRenderer.cs
Remove the VectorGraphic that represents torque from TorqueCircle.

There's no point as is now independent from the circular arrow.

Conflicts:
	CoMVectors.cs
refactor some code

Conflicts:
	Gui.cs
use LateUpdate so vectors doesn't change when dragging parts
change again the color settings of the arrows
refactoring

Conflicts:
	RCSBuildAid.cs
readme++ and changelog++

Conflicts:
	Gui.cs
restore CoM vectors lower limit to its original value.
version 0.4.5