Further optimize the apple touch icons

Reduce the total size of the icons by 1.7KB using ImageAlpha
(16 colors - no visible difference) and ImageOptim.

Close #1406.
Update CONTRIBUTING.md

* Reflect the recent changes in @necolas's Issue Guidelines:
  https://github.com/necolas/issue-guidelines.
* Add note about not opening issues and pull requests regarding the code
  in the Apache Server Configs, jQuery, Modernizr and Normalize.css.
Update to Apache Server Configs v1.1.0
Docs: Update `.htaccess` related info and links
Docs: Update section about the X-UA-Compatible meta option

Chrome Frame is not supported anymore and we removed the option in
8fc2650.
This commit removes the documentation about Chrome Frame in the
X-UA-Compatible meta tag docs.

Related to #1396.
Further optimize the apple touch icons

Reduce the total size of the icons by 172 bytes using zopfli.

Close #1415.
Docs: Update the `Track JS errors in GA` section

Add column number parameter to the example to reflect the recent changes
in the specification and in the Chrome and IE 10 implementations.

http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#errorevent
https://code.google.com/p/chromium/issues/detail?id=264197

Close #1417.
Compress .png files losslessly

Use `zopfli-png` with 1000 iterations, `pngout /r` with various block sizes and deflopt.

apple-touch-icon-114x114-precomposed.png | Bin 865 -> 751 bytes
apple-touch-icon-144x144-precomposed.png | Bin 947 -> 939 bytes
apple-touch-icon-57x57-precomposed.png   | Bin 495 -> 450 bytes
apple-touch-icon-72x72-precomposed.png   | Bin 575 -> 512 bytes
apple-touch-icon-precomposed.png         | Bin 495 -> 450 bytes
apple-touch-icon.png                     | Bin 495 -> 450 bytes

The total difference is -320 bytes.

Closes #1418.
Move font-related base declarations to `html`
Update CHANGELOG
Update normalize.css to v1.1.3
Use one apple-touch-icon instead of six

This commit removes five Apple Touch Icons with different sizes for
the same icon and adds a new icon `apple-touch-icon-precomposed.png`
with a resolution of 152×152px.
Apart from that it adds documentation on how to add more icons if
you need them within your project.
Using only one Apple Touch Icon saves time and is enough in most
cases.

Closes #1367.
Closes #1425.
Merges Upstream Changes