add author and downloads fields + fixtures
add search, recent, and popular routes under books resource
created partial for main navigation
cleanup commented out code and add navigation partial
remove setting model attribute (each sub controller will provide there own)
minor stylistic changes to h1 and search box
remove outlet and header
have books template just provide an outlet
initial book controller
initial popular controller (used for sorting)
initial popular route
remove debugging log statement
add top padding to main navigation
initial recent bookmarks controller
initial index route for books
partial for listing books
initial route for recent books
uncomment brand link at top of the page
initial template files for books resource
rename document model to book