Attached image position CSS moved to custom-style.css for easy customisation.

- Updated to use all versions of Yahoo Pure.CSS (https://purecss.io/). It is possible to choose any of the following versions: v0.6.0, v0.6.1, v0.6.2, v1.0.0, v1.0.1 (the latest). All versions of Pure.CSS can be served form unpkg CDN over https.
- Font small, normal, large
- Improved header image rotator in MS Edge
- Views grid is presented now as divs instead of table
- PageSpeed Insights optimisation
  Minor bugs were addressed:
- #2894639: Dropdown Menu items automatically load page on iPhone
- #3027414: zeropoint_image doesn't respect the class attribute
- #2918632: Icon in search block as an option.

      to choose any of the following versions: v0.6.0, v0.6.1, v0.6.2, v1.0.0 (the latest).
    o Main Menu Displayed Vertically at HTTPS site is no longer an issue. All versions
      of Pure.CSS are now served form unpkg CDN over https.
    o Making a delay on the dropdown menu

- A complete theme redesign made with mobile in mind: compatible, light and fast.

    o Notice: Undefined variable: themed_regions in _preprocess_block()
    o hoverIntent r6 update

  o #1906514: Polls colors are not contrastant
  - Page title of internal pages has wrong dimmensions