Grand-cypher

> Many performance updates, language features, and label support.

Features

- Support for multi-hop queries in `MATCH` statements (24, thanks khoale88!)
- Support for single edge and node labels using the `__labels__` magic property (25, thanks khoale88!)

Performance

- Performance improvements by khoale88 that eliminate duplicated entity lookups (28)

> This version adds support for boolean arithmetic with AND/OR, and other language features.

Features

- Support for boolean arithmetic with AND/OR (20, thanks khoale88!)
- Support for undirected edges (`(A)-[]-(B)`)

Housekeeping

- Add install dependencies to `setup.py`

> Lots of great new language support by khoale88, thank you!!

Performance

- Improves performance of the `limit` argument by offloading the result-limiting behavior to `grandiso`.

Features

- Add behavior for disconnected matches of multiple graph components (17, thanks khoale88!)
- Add support for anonymous nodes (16, thanks khoale88!)
- Support chained edges like `(A)-[]->(B)-[]-(C)` (15, thanks khoale88!)
- Support backwards edges (14, thanks khoale88!)
- Support `NULL` and the `is` operator in queriy `WHERE` and property queries (13, thanks khoale88!)

> This version adds support for node-only matches.

> This version adds initial support for querying networkx-flavored graphs with the Cypher query language.