set up section_order and lesson_order properly
wire up the back end for the next_* and prev_* methods
refactor to add lesson_path helpers and enable next / prev nav in views
refactor slightly to remove unnecessary arrow code
add shell curriculum file
wire up the bottom of lesson CTA
add more balsamiq colors and color responsiveness to cta buttons
fix long breadcrumb wrap issue
refactor to partials the lower cta and tab navigation
fix long headline styling issues
fix overlap issues with the parallax header scroll effect
fix h1 to an h2
add scroll prompt on a delay
hack a solution to fix tab navigation misclick issues
tweak scroll down prompt
style index page buttons flatter
fix long lesson title styling for lower CTA