smtk::project Version 2 (rebased)
Replaces current smtk::project code with new version that supports generalized storage of resources.
- Makes smtk::project::Project a new smtk resource.
- Includes support for project & resource subclassing in python.
Rebased to smtk::master 21-Apr-2021 (7f4842d2)
Supersedes MR !2434 (closed)