use Guard
use Spork
create and use full_title helper
take '| Home' out of home page title
add chapter 4 exercises
solve 4.1
solve 4.2
solve 4.3
TODO: actually go through Ruby Koans later
fix incorrect/empty descriptions of 4.3/4.4
solve 4.4
fix incorrect/empty descriptions of 4.3/4.4
solve 4.1
solve 4.2
TODO: actually go through Ruby Koans later
solve 4.4
Merge branch 'ex4.4'