Updated Rips zigzags * Updated to use Bron-Kerbosch * Compute in the order of increasing epsilon, and decreasing point sizes * Split into plain zigzag (rips-zigzag) and image zigzag (rips-image-zigzag) * Added minor enhancements (show_progress and timers)

add_subdirectory			(alphashapes)
#add_subdirectory			(ar-vineyard)
add_subdirectory			(cech-complex)
add_subdirectory			(fitness)
#add_subdirectory			(grid)
add_subdirectory			(triangle)
add_subdirectory			(poincare)
add_subdirectory			(rips)