Major changes
- added `Cube` and `Report` classes to provide more flexibility when interacting
with Cubes and Reports. These new classes provide the ability to select
attributes, metrics, and attribute elements before importing them to Python as
`pandas` DataFrames
- added `Dataset` class that allows defining and creating multi-table cubes from
multiple DataFrames, with improved data upload scalability, and the ability to
define the Dataset within a specific folder
- introduced graphical user interface to access the MicroStrategy environment
using interactive Jupyter Notebook add-in
Bug fixes
- ensured session cookies are passed when closing the connection