Docs: Use `https://` where possible

Close #229
Docs: Update info from js.md regarding plugins.js

Ref https://github.com/h5bp/html5-boilerplate/pull/1558
Docs: Add information about the `robots.txt` file

Ref https://github.com/h5bp/html5-boilerplate/pull/1598
Update to Normalize.css v3.0.2
README: use `https` protocol to clone the repo

Close #231
Update to Apache Server Configs v2.9.0
Update `Apple touch icons` and according docs

Close #227
Close #232
Fix colors in touch icons
Replace short links with original links

While the short links look "nicer" and can be useful (e.g.: stats),
when our site (http://h5bp.com) goes down, it prevents users from
accessing the information they point to.

Ref https://github.com/h5bp/html5-boilerplate/pull/1619
improving .custom-col
Merge branch 'master' of https://github.com/h5bp/mobile-boilerplate

* 'master' of https://github.com/h5bp/mobile-boilerplate:
  Replace short links with original links
  Fix colors in touch icons
  Update `Apple touch icons` and according docs
  Update to Apache Server Configs v2.9.0
  README: use `https` protocol to clone the repo
  Update to Normalize.css v3.0.2
  Docs: Add information about the `robots.txt` file
  Docs: Update info from js.md regarding plugins.js
  Docs: Use `https://` where possible

Conflicts:
	CHANGELOG.md
	README.md
	doc/crossdomain.md
	doc/css.md
	doc/extend.md
	doc/faq.md
	doc/html.md
	doc/js.md
	doc/misc.md
	doc/usage.md
	index.html