Fix Grunt link in docs

The repo has moved from 'cowboy/grunt' to 'gruntjs/grunt'.
Docs: replace `htaccess.md` with link (fix #1344)

Remove `htaccess.md` and link to the Apache `README.md` in
the `server-configs` repository as the documentation for the
configurations is now officially maintained in that repository.
Update normalize.css to v1.1.1
Remove Google Analytics protocol check

Google now serves all Analytics scripts via SSL also so the protocol
check is no longer necessary.

Close #1319
Update CHANGELOG
v4.2.0
Docs: fix broken links