theme: upgrade to latest v4.1 dev (talk front matter upgraded)

Also:

- Project and Custom widgets renamed (upgraded)
- Rearranges section positions and adds demo section to introduce
the template and help the user get started

content/home/demo.md

@@ -0,0 +1,68 @@
++++
+# A Demo section created with the Blank widget.
+# Any elements can be added in the body: https://sourcethemes.com/academic/docs/writing-markdown-latex/
+# Add more sections by duplicating this file and customizing to your requirements.
+
+widget = "blank"  # Do not modify this line!
+active = true  # Activate this widget? true/false
+weight = 15  # Order that this section will appear.
+
+# Note: a full width section format can be enabled by commenting out the `title` and `subtitle` with a `#`.
+title = "Academic Kickstart"
+subtitle = ""
+
+[design]
+  # Choose how many columns the section has. Valid values: 1 or 2.
+  columns = "1"
+
+[design.background]
+  # Apply a background color, gradient, or image.
+  #   Uncomment (by removing `#`) an option to apply it.
+  #   Choose a light or dark text color by setting `text_color_light`.
+  #   Any HTML color name or Hex value is valid.
+
+  # Background color.
+  # color = "navy"
+  
+  # Background gradient.
+  gradient_start = "DarkGreen"
+  gradient_end = "ForestGreen"
+  
+  # Background image.
+  # image = "image.jpg"  # Name of image in `static/img/`.
+  # image_darken = 0.6  # Darken the image? Range 0-1 where 0 is transparent and 1 is opaque.
+
+  # Text color (true=light or false=dark).
+  text_color_light = true
+
+[advanced]
+ # Custom CSS. 
+ css_style = "padding-top: 20px; padding-bottom: 20px;"
+ 
+ # CSS class.
+ css_class = ""
++++
+
+Welcome to the **Academic Kickstart** template!
+
+Follow our [Getting Started](https://sourcethemes.com/academic/docs/get-started/) and [Page Builder](https://sourcethemes.com/academic/docs/widgets/) guides to easily personalize the template and then [add your own content](https://sourcethemes.com/academic/docs/managing-content/).
+
+For inspiration, check out [the Markdown files](https://sourcethemes.com/academic/docs/install/#demo-content) which power the [personal demo](https://academic-demo.netlify.com/). The easiest way to publish your new site to the internet is with [Netlify](https://sourcethemes.com/academic/docs/deployment/).
+
+- [View the documentation](https://sourcethemes.com/academic/docs/)
+- [Ask a question](http://discuss.gohugo.io/)
+- [Request a feature or report a bug](https://github.com/gcushen/hugo-academic/issues)
+- Updating? View the [Update Guide](https://sourcethemes.com/academic/docs/update/) and [Release Notes](https://sourcethemes.com/academic/updates/)
+- Support development of Academic:
+  - [Donate a coffee](https://paypal.me/cushen)
+  - [Become a backer on Patreon](https://www.patreon.com/cushen)
+  - [Decorate your laptop or journal with an Academic sticker](https://www.redbubble.com/people/neutreno/works/34387919-academic)
+  - [Wear the T-shirt](https://academic.threadless.com/)
+
+{{% alert note %}}
+This homepage section is an example of adding [elements](https://sourcethemes.com/academic/docs/writing-markdown-latex/) to the [*Blank* widget](https://sourcethemes.com/academic/docs/widgets/).
+
+Backgrounds can be applied to any section. Here, the *background* option is set give a *color gradient*.
+
+**To remove this section, delete `content/home/demo.md`.**
+{{% /alert %}}