Dash-labs

Added
- [86](https://github.com/plotly/dash-labs/pull/86) Allow title and description to be a function so that meta data and title can be updated dynamically when using path variables. [issue #74](https://github.com/plotly/dash-labs/issues/74)

Fixed
- [86](https://github.com/plotly/dash-labs/pull/86) Made the pages folder relative to the root directory of the app, rather than the cwd. [issue #84](https://github.com/plotly/dash-labs/issues/84)

Added
- [61](https://github.com/plotly/dash-labs/pull/61). New feature for handling variables in the URL.
Fixed
- [73](https://github.com/plotly/dash-labs/pull/73). Allow for multiple values in query strings.
- [78](https://github.com/plotly/dash-labs/pull/78). Fix `/pages` for Dash Enterprise.

Fixed
- [59](https://github.com/plotly/dash-labs/pull/59) Fixed bug that prevented order prop from changing the order of the modules in dash.page_registry
- [55](https://github.com/plotly/dash-labs/pull/55) Fixed bug that prevented multipage apps from working in windows: Fixed bug #52. Transitioned function away from the glob library to the os library to ensure functionality with windows.

Added
- Added Dash Pages: A plug-in to simplify building multi-page apps.
- Added documentation: 08-MultiPageDashApp.md and 09-MultiPageDashAppExamples.md.
- Added demos: examples of multi-page apps using the Dash Pages plug-in.

Removed
- removed code, tests, and demos for projects documented in chapter 02 through 07.

Changes
- updated documentation to include status of projects in chapters 02 through 07.

Added
- Added Windows support for the `app.long_callback` decorator ([32](https://github.com/plotly/dash-labs/pull/32))
- Added caching support to the `app.long_callback` decorator using the `cache_by` argument ([32](https://github.com/plotly/dash-labs/pull/32))
- Add support for updating arbitrary component properties while a long_callback is running using the `set_progress` function.

Changes
- To enable Windows support, the FlaskCaching backend to `app.long_callback` has been replaced by a backend based on the `daskcache` library

Added
- Added Dash app plugins to support a new `app.long_callback` decorator to support long-running callback functions ([24](https://github.com/plotly/dash-labs/pull/24)).

Changes
- Replace use of "role" with "location" throughout the templates API ([25](https://github.com/plotly/dash-labs/pull/25)).
- Remove `_input`/`_output` suffix from template component builders, and replace with `new_` prefix ([25](https://github.com/plotly/dash-labs/pull/25)).