remove duplicate text scaling
more nav twerks for getting started page
redo docs footer a bit
Fix component margin and padding values to use @line-height-computed
Merge pull request #7843 from burnsra/3.0.0-wip

Fix link to examples
Merge pull request #7845 from aricketson/3.0.0-wip

Fix component margin and padding values to use @line-height-computed
twerk nested nav links
Merge branch '3.0.0-wip' of github.com:twitter/bootstrap into 3.0.0-wip
Font-size and line-height tweaks

* Use 1.428 for line-height instead of 1.5
* Use  function for full pixel values instead of decimals