Add the Course and Unit models
add currentCourse method to base action
base action should accept Error in error callback
show action now uses the Course model to get content
Can go to previous or next unit of a course
move app-level monkey patching to monkey.coffee
modify project builder to use course.json

doesn't do whole sale rsync anymore
Merge branch 'course.json'
move stylesheet into css subdir
remove jquery layout for now
Merge commit 'fa14b87'