pidgin/nest

Added link to the portable Windows zip on Sourceforce ([NEST-31](https://issues.imfreedom.org/issue/NEST-31))

Added link to the portable Windows zip on Sourceforce NEST-31
Also added a single line to describe Finch NEST-30

Testing Done:
Firefox 80.0.1 (64-bit)

Bugs closed: NEST-30, NEST-31

Reviewed at https://reviews.imfreedom.org/r/133/
[{{ range $index, $page := .Site.Pages }}
{{- if ne $page.Type "json" -}}
{{- if and $index (gt $index 0) -}},{{- end }}
{
"uri": "{{ $page.Permalink }}",
"title": "{{ htmlEscape $page.Title}}",
"tags": [{{ range $tindex, $tag := $page.Params.tags }}{{ if $tindex }}, {{ end }}"{{ $tag| htmlEscape }}"{{ end }}],
"description": "{{ htmlEscape .Description}}",
"content": {{$page.Plain | jsonify}}
}
{{- end -}}
{{- end -}}]