Replace Makefile with a shelljs makefile.

Now it's truly cross-platform.
Merge pull request #377 from XhmikosR/shelljs

Replace Makefile with a shelljs makefile.
Tweaking changes to shelljs to support automated deployments.
Moving bootlint and wp-plugin tasks to make.js, adding some comments to readme.
Merge branch 'develop' into shelljs

Conflicts:
	package.json
Removing logs, as it's generated by make.js.
Fix yet another validation error.

It was caused by a missing quote in _tweets.yml.
views/_partials/social.jade: Simplify column grid.
README.md: add dependency badges.

[ci skip]
README.md: mention Bootlint _config option.

[ci skip]
Merge pull request #385 from XhmikosR/develop

Fix yet another validation error + minor tweaks
Merge pull request #379 from MaxCDN/shelljs

Shelljs for Windows users.
Fixing issue with configuration based stubbing of extras content.
Merge pull request #389 from MaxCDN/develop

Releasing #377 / #379 and #385