locate bug in RollingGridSDF-Mesh.h when get the index of grids that need to be reseted
Change UpdateShift() to UpdateLocalShift(); Change UpdateGlobalShift() to UpdateLocalAndGlobalShift();
add comment for rolling grid sdf
Improve Coding sty in Rolling Grid SDF; Reorganize BoundedVolumeGrid.h
improve function ApplyShiftToVolume();