Bestatic

Fixed wrong sys.exit.

v0.0.23u
Fixed wrong sys.exit.

Added features:

* Live reload has been implemented.
* The static-content directory copy to destination directory has been added.
* The newpost and newpath can now create posts and pages at specific paths.
* Quickstart slugs have been updated.
* Bestatic tag has been added (which can be turned off via config.yaml).
* Help messages have been cleaned up and rewritten.
* Windows installer now works correctly.

Added features:
- Custom template for different pages
- Different options for homepage.

Bestatic release 0.0.21. In this release, we are implementing PyPI upload using GitHub Actions.