Expose site.static_files to Liquid
Test fetching of static files
Test site.static_files
Add StaticFile#to_liquid and StaticFile#relative_path
Add docs for site.static_files
Fix error in tests.
Add StaticFile#to_liquid['extname'] :)
Sort the static files by relative path before sending to liquid
Update docs to include extname for static file object in liquid. [ci skip]
Merge pull request #2075 from jekyll/expose-static-files