adds bower_components on gitignore
adds CDN bootstrap and fontawesome
comments out new CDN due to bootstrap incompatibility
replaces all .row-fluid to .row

Part of the Bootstrap migration from 2.0 to 3.0
replaces all .span to .col-md-

Part of the Bootstrap migration from 2.0 to 3.0
successfully updates spans and row
repaves all polaroid to thumbnail

Part of the Bootstrap migration from 2.0 to 3.0
removes unused historical css

responsive.css
variables.css
normalize.css