fix(typography): bump line height to 20px

When the default font size was bumped down to 13px, it caused the computed line
height to drop from 20px to 18px. This increases the unit-less line height to
increase computed line height back to 20px.
Merge pull request #32 from rackerlabs/bradgignac/line-height

fix(typography): bump line height to 20px
fix(navbar): restore margin beneath navbar

While building out the demo, the navbar margin was set to zero to allow for
multiple navbars (primary, secondary, utility, etc.) to be stacked together.
This broke default Bootstrap behavior and caused margin/padding to be added to
the content. Instead, I've restored the default bottom margin on navbars and
only removed the bottom margin when navbars are sibling elements.
fix(grid): match navbar collapse to grid breakpoints
feat(navbar): skin default navbar

Instead of skinning the default navbar to look like Canon's utility navigation,
simply update the font, background, and border colors to match Canon's visual
design.
feat(navbar): skin inverse navbar

This commit sets font, background, and border colors for the inverted version of
Bootstrap's default navbar. All colors are based on Canon's utility navigation.
feat(navbar): skin utility nav
refactor(navbar): extract navbar height adjustment to mixin
feat(navbar): skin footer nav
feat(navbar): skin primary nav
docs(navbar): update demo to use new navbar classes
fix(navbar): fix link alignment

Source Sans Pro doesn't render centered inside the line height so we apply
custom padding values to make it appear visually centered with text using a
different font.
fix(variables.less): revert state color variables
chore(fonts): check in build font assets
chore(build): update compiled CSS
chore(release): release v0.2.0
Merge branch 'master' of https://github.com/rackerlabs/canon-bootstrap

Conflicts:
	build/css/canon-bootstrap.css
	build/css/canon-bootstrap.css.map
	build/css/canon-bootstrap.min.css
	build/css/canon-bootstrap.min.css.map
	docs/templates/demo.html
	docs/templates/detail.html
	docs/templates/layout.html
	less/mixins.less
	less/nav.less
	less/variables.less