added repository field to package.json
added devDependencies async and cheerio
updated populateBooks script to skip existing files
added support for anyWord option (closes #1)
made search box text a bit clearer
updated populateBooks.js to create the books/ directory if it isn't there
minor changes to demo HTML file
updated usage section on demo page
added bottom margin to attribute list items
switched demo page to "Paper" Bootswatch theme
prevent page links from updating the address bar
Merge branch 'master' into gh-pages