Bulk loading feature

With this release, a new to_sql function is added to bulk load Pandas DataFrames to Nuvolos. The package back to snowflake-sqlalchemy and snowflake-connector-python.

First ODBC-based release

Package is loaded to PyPI: https://pypi.org/project/nuvolos/0.3.1/

Snowflake connector + SQLAlchemy

This is a stable version relying on the Snowflake connector and SQLAlchemy.