Support page bundles

[GeertvanHorrik]

I was experimenting with page bundles (keeping content & images together), but it was not showing any content.

I have updated the list template to this:

{{ define "main" }}
    {{ if .Content }}
        {{ .Content }}
    {{ else }}
        <div class="section">
            <dev class="section-title">{{.Section}}</dev>
            {{ range $index, $element := .Paginator.Pages }}
                <div class="list-item">
                    <a class="entry-title" href="{{ .URL }}">{{ .Title }}</a>
                    {{$page := .}}
                    {{with .Description}}
                    <p>{{.}}</p>
                    {{end}}
                    <div class="meta">
                    {{with .Date}}
                        <i class="far fa-calendar-alt"></i> {{.Format "Jan 2 2006"}}
                    {{end}}
                    <br>
                    {{with .Params.tags}}
                            <i class="fas fa-tags"></i> 
                            Tags: {{ delimit . ", " }}
                    {{end}}
                    </div>
                </div>
            {{end}}
        </div>
        {{ partial "pagination.html" $ }}
    {{end}}
{{end}}

This allows me to organize content like this:

/blog
  /2020
    /04
      /my-title
        /_index.md
        /myimage.png

[GeertvanHorrik]

Looks like this is only required when using _index.md instead of index.md. The latter is required for posts to show up in the recent blog posts anyway, so I'd recommend to use index.md when using page bundles for blog posts.