Added
- The `create_session()` function.
- The `package` attribute of the output of `user_info()`.
- The `make_copy` keyword parameter for `all_variables()`.
- The `overwrite` keyword parameter for `set_session_variables()`.
- The `overwrite` parameter for the `/api/session` POST endpoint.
- The `persistent` option for the `/api/session/action` POST endpoint.
- Recipe for passing variables from one session to a newly created
other session.