Function implementations for the base Voronoi container class. 
Function implementations for the loop classes. 
Function implementantions for the voro_compute template. 
Function implementations for the container and related classes. 
Function implementations for the unitcell class. 
Function implementations for the container_periodic_base and related classes. 
Function implementations for the pre_container and related classes. 
Implementations of the small helper functions. 
Function implementations for the voronoicell and related classes. 
Function implementations for the derived wall classes.