Favicon: update plugin element selector

This change addresses the W3C no longer allowing link[rel="shortcut icon"]
for favicons.  Plugin now looks for link[rel="icon"] elements to determine
if a mobile favicon should be added.
Favicon: update working examples with link[rel='icon']
Favicon: update docs with link[rel='icon'] change
Documentation: Removed v3.0 development download links
Merge pull request #5077 from pjackson28/removewetv30devlinks

Documentation: Removed v3.0 development download links
Merge pull request #5076 from patheard/favicon

Favicon change to rel="[icon]"
[CAROUSEL] - Corrected incorrect index target of control text. Causing doubling of text on click/focus events
Merge pull request #5079 from masterbee/patchfixcarousel

[CAROUSEL] - Corrected incorrect index target of control text. Causing doubling of text on click/focus events
Docs: Add getting started guide
Merge pull request #5082 from nschonni/v4-getting-started-docs

Docs: Add getting started guide
Update both the v4.0-ci and wet-boew submodules.
Merge pull request #5085 from LaurentGoderre/fix-working-examples

Update both the v4.0-ci and wet-boew submodules.