Added Command_Line interface for GULP
Merge branch 'master' of https://github.com/materialsproject/pymatgen
Merge branch 'master' of https://github.com/materialsproject/pymatgen
Modifications to the VoronoiConnectivity code, added a method to find
Voronoi Connectivity and distance between Voronoi Connected objects
Merge branch 'master' of https://github.com/materialsproject/pymatgen
	Merge branch 'master' of https://github.com/materialsproject/pymatgen
Added method get_connections:

Returns a list of site pairs that are Voronoi Neighbors, along
        with their real-space distances.

Also made cutoff distance in VoronoiConnectivity a possible input variable.
Default is 10, should be backwards compatible.