Also add better comments

Turns out we were nixing the default browser spacing for bullets and
numbers, so this reverts that and instead just twerks the top/bottom
`margin`.

redundant lines removed

components docs: backticks ==> <code>

upgrade holder to 2.0, update thumbnail examples in docs to fit inside containers

CSS docs page: backticks ==> <code>

Duplicate ID navbar-example

change version of recess to 1.1.7

Duplicate ID drop5

Fix

Docs Customize toggle button used incorrect selectors

Docs "Customize and Download" button didn't send the correct parameters

fix JSON syntax error in composer.json

* Update example sections to include basic, mobile-desktop, and mobile-tablet-desktop implementations
* Add more examples to the grid example page
* Red columns instead of gray for more Bootstrapy aesthetic

Update css.html

Set validation states also for addons

* Update docs to include table of grid levels and behaviors
* Change from .col-md to .col-sm to match existing size variables we use elsewhere
* Keep .col-lg as-is though for simplicity as we won't likely add a fourth level of the grid
* Combine responsive .container breakpoints with grid breakpoints in grid.less
* Other misc docs updates

Missing word "in" in "Someone famous in Source Title"