Creating RXDebug for watching memory

This will count the live instances of any object you pass to it.
myArray.Log() and myList.Log()

For easy logging of lists and arrays.

If you want more information, myArray.Log("identifier") also works.
Adding some more easing equations to RXEase
Making FSoundManager better

Now FSoundManager properly unloads music and won't restart a song if
it's already playing (unless you want it to).

You can also unload sounds one-by-one now, and you can preload sounds
too.
FWatcher now updates in real time

Previously, the FWatcher would only update when it regained focus, now
it should update all the time when it's selected.
Check for isOnStage when building node matrices