snap-python

fix typo in function name

updated the manual text with the new interface for functions for triads,kcore,approx neighborhood, and eigen/singular values

- updated the manual text with the new interface for functions for breadth and depth first search, node centrality, and community detection

- updated the manual text with the new interface for functions for plotting and drawing and connected components

- updated the manual text with the new interface for functions for edge count, graph manipulation, subgraphs and conversions, and graph information