Attempt to fix NRE reported by pantheis  & toadicus

And add some comments
Catch Exceptions tossed by GameObject.transform after parts have been removed by Unity.
Merge pull request #14 from toadicus/master

Catch Exceptions tossed by GameObject.transform...
Fix the last reported NRE and improve the behaviors on Vessel and Debris .Die() call
2.4.0
added alpha, linAlphaDecay and logAlphaDecay options.
Add a logGrowScale curve
2.4.1
Actualy load the curve
Changed the code to use colorAnimation, now it actually works.
Now applying changes when just the base Alpha is changed as well.
Merge r4m0n's alpha curves
2.4.2
Fix the hidden collider problem
2.4.3