Databricks-dbapi

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* ``pyhive`` and ``pyodbc`` are now optional dependencies. At least one of {``hive``, ``odbc``} must now be specified as an extra.
* Change driver and dialect identifiers from bytes to string.

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* Add pyodbc as a dependency
* Add ODBC DBAPI connection
* Add kwargs to connect signature, which are passed down to pyhive/pyodbc connect functions
* Add pyodbc-driven sqlalchemy dialects
* Remove any user/password authentication from documentation
* BREAKING: Rename the ``databricks`` module to ``hive``, to explicitly differentiate between the two drivers
* BREAKING: Remove ``cluster`` and ``org`` arguments from DBAPI connect signature

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* Override get_columns in DatabricksDialect to account for differences in Databricks and OSS Hive partition header
* Fix version file
* Update black and add isort
* Add org id argument for connection

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* Add module globals to make DBAPI PEP 249 compliant
* Allow port and database name to be passed in connect function
* Add compatibility with SQLAlchemy

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* Add docstring
* Add http_path parameter for Azure compatibility (thanks gwerbin)
* Make metadata available at package level

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* Fix email