Fixed CDN link for Highlight.js and nested lists

Fixed CDN link for Highlight.js and nested lists
Fix for nested lists on all screen sizes
Removed gallery and large image styling
Moved Grunt to subdirectory

Moved Grunt to subdirectory to be able to use the new package.json for themes
Added support for tags

- Added support for tag-pages
- Updated TimeSince script
- Added rel tags for pagination
Fixed font sizing and weight for headings

Closes #34
Merge pull request #32 from reedyn/maintenance-1.1

Milestone 1.1