RC3: Big precision error when saving levels

There is a precision bug in RC3 when saving levels. Currently in mathTypes.cc you have this function for converting a Point2F to a string:

ConsoleGetType( TypePoint2F )
{
   Point2F *pt = (Point2F *) dptr;
   char* returnBuffer = Con::getReturnBuffer(256);
   dSprintf(returnBuffer, 256, "%.3g %.3g", pt->x, pt->y);
   return returnBuffer;
}

This doesn't work well with fractional values. For instance when sprite was placed at 166.3, 94.05 it converts this to 166, 94.1 when saving the level. So it would look right in LevelBuilder, but when we went to play the level the objects would have moved. This totally screws you when your trying to line up objects with any level of precision.

The problem is that for %g the precision is not decimal digits, but significant digits. The fix is to use %.3f which properly writes out 166.3, 94.05 in all my test cases.

Also note this bug effects ConsoleGetType( TypePoint2FVector ) in t2dUtility.cc which needs to be changed to %.3f from %.3g.