Issue figure attr

[it-gro]

Hi Yip
Here's another one (now using a branch).
There's an issue with the figure attributes attr and attrlink.
{{< figure thumb="-thumb" link="/img/hugo-dolor.png" size="900x450" caption="foo" attr="(c) by bar" attrlink="https://www.example.com" >}}
leads to an error:
ERROR 2018/01/10 15:07:44 error processing shortcode "shortcodes/figure.html" for page "post/test-heg-figure-attrlink.md": template: shortcodes/figure.html:23:57: executing "shortcodes/figure.html" at <.Get>: can't evaluate field Get in type string
I fixed that and improved the captions. If a figure has an attribution it needs to be shown:
https://stackoverflow.com/questions/21483356/how-to-mark-the-copyright-of-an-image-in-html

So I did:
figure.html:

        {{- if or (.Get "attr") (.Get "attrlink") }}
			  <footer><small>{{if .Get "attrlink"}}<a href="{{.Get `attrlink`}}">{{ default (.Get "attrlink") (.Get "attr") }}</a>{{ else }}{{ .Get "attr"}}{{ end }}</small></footer>

load-photoswipe.js:
title : ($title ? $title : "") + ($title_footer ? ($title ? "<br/><small>" : "") + $title_footer + ($title ? "</small>" : "" ) : "")
load-photoswipe.html, load-photoswipe-theme.html, hugo-easy-gallery.css:
Adjust color for a tag
(Kind of ugly in the html files, maybe you see a better way)

hugo-easy-gallery.css I did ad well:

figure img {
    max-width: 100%;
}

You have this in https://www.liwen.id.au/css/main.css as well.
Without it, the thumbs are cropped. It took me a while until I figured that on out.

Test site:
https://github.com/it-gro/HugoTestingHegAttrIssue

Kind regards