Add component_labels and n_components properties for disconnected graphs. Bump to version 2.0.0#82

bjoaofelipe merged 3 commits intoKrishnaswamyLab:masterKrishnaswamyLab/graphtools:masterfrom

MattScicluna:add_disconnection_warningMattScicluna/graphtools:add_disconnection_warningCopy head branch name to clipboard