Add default markup

Add sample content and a11y roles.

Closes #31.
Closes #38.
Add documentation about how to write modules with Sass

Closes #41.
Remove grunt-imageoptim and add grunt-contrib-imagemin

ImageOptim is Mac specific. We don't want this, so I included the
more generic imagemin task.

Closes #26.
Restructre copying of files and dist-folder structure

Use a folder for each version distributed version.

Closes #11.
Use only one Apple Touch Icon

Please see h5bp/html5-boilerplate#1367 and h5bp/html5-boilerplate@71ca9fb
for more information.
More structure for grunt-plugins and Bower components

Also updates component versions
Add configuration object for Grunt for easier changes

This commit introduces a configuration object in Gruntfile.js which
you can change more easily than digging through the whole file.

Closes #46.
Merge branch 'v1.0.0' of github.com:drublic/init into v1.0.0

Conflicts:
	CHANGELOG.md
	Gruntfile.js