allow get_type_hierarchy to return from an id rather than the entire hierarchy
correctly listing bases of optional start node. and use query args.
formatting
'MATCH' depends on start_type_id
whitespace
test for get_type_hierarchy return values
pyflakes line length
pyflakes line length and tab length
pyflakes indentation
flake8
remove extra key lookups
Merge pull request #49 from onefinestay/get_type_hierarchy_from_starting_point

allow get_type_hierarchy to return from an id rather than the entire hierarchy