Add turbolinks.js 1.3.0.

The js, minified js and sourcemap files were created with commands:
coffee -c turbolinks.coffee
closure-compiler \
     --js turbolinks.js \
     --create_source_map turbolinks.min.map \
     --source_map_format=V3 \
     --js_output_file turbolinks.min.js
echo '//# sourceMappingURL=turbolinks.min.map' >> turbolinks.min.js