Customizable model name, figsize, and session info

[shapiromatron]

• The figure size can be set on all plots generated by datasets and models. If unset, the figure size is set to the constant size defined in the plotting module, (8,5), consistent with previous behavior
• Added name to model settings metadata. This can use useful when customizing a specific model and providing a custom name
• Added three optional parameters to the Session, as well as the MultiTumor object:
  1. id (int),
  2. name (str),
  3. description (str)
• Update version to new alpha release