Remove overly-specific last child declaration on pills
Use margin instead of padding for inline list guttering

Causing spacing issue on list items with background colours and bespoke padding
Remove unused font sizing classes
Add float helper classes
Divided list class
Include video in vertical rhythm
Remove support for 'lh' element - depreciated
Remove clearfix from reset
Move clearfix into helper classes
Merge pull request #33 from jshjohnson/master

Tweaks based on testing Indigo in the wild