add zurb-foundation gem
generate zurb-foundation
use haml for views
ingore system files on mac os
standard zurb-foundation top-bar
top-bar prototype

[Delivers #52864201]
welcome area prototype

[Delivers #52865923]
prototype features block on home page
finish home page prototype

[Delivers #52867369]
add footer to the layout

[Delivers #52867369]
generate problems controller
problem page prototype

[Delivers #52920663]
generate textbooks controller
textbook page prototype

[Delivers #52949931]