Initial doc write for evaluate functions
Add docs to two more functions
Add doc for contingency_table
Add doc for rand_values function
Tweak and document edit_distance functions

They gain a size_threshold kwarg to ignore small merges and splits.
Update doc and function for relabel_from_one
Document rand_by_threshold function
Add documentation for special points functions
Add documentation for VI functions
Add references to synapse geometry package
Remove non-ASCII characters
Add docs for UCM evaluation VI functions
Add doc for vi_tables
Add doc for sorted_vi_components
Add doc for split_components
Add refs to Rand Index functions
Add docs; fix whitespace
Add doc for reduce_vi
Add doc for sem and rename a to ar
Add doc for vi_statistics