tabula-py 2.0.0

Release v2.0.0

on Python PyPI

This is major upgrade including backward incompatible changes. See detail in #200

• read_pdf() returns a list of DataFrame even if there is a table in a PDF without setting output_format
• multiple_tables becomes True by default
• renaming wrapper module to io
• stop using kwargs for build_options to avoid unexpected arguments
• add validation for output_format option