Add missing fields to serialization

Also use Option for Page::summary

Close #38

Copy only static files that triggered the change notification

fix link to "releases"

Anchors

Add current_url and current_path

To every templates, useful when doing
navigation to know which link is currently
active

Try to make windows work + remove musl

Add markdown and base64 filters

Allow links to .md pages in pages contents

WIP shortcode

Use lazy front-matter regex

Using a greedy regex could lead to unintended consequences, like the
inability to syntax highlight a unified diff. This resolves issues like
that by using .*? instead of .* so that the closing +++ is matched as
soon as possible.

Prettier console output

Allow selecting a config file other than config.toml