Removed selectivizr as a dependency for IE8.
Eliminated use of :last-child in multimedia plugin.
Eliminated use of :last-child in menu plugin demo.
Eliminated use of :not in the carousel plugin.
Eliminated use of :not in details polyfill.
Eliminated use of :not in tabs plugin.
Merge pull request #3846 from thomasgohard/remove-selectivizr

Remove selectivizr