correct liquid syntax
fix typo
Merge branch 'master' of github.com:robwierzbowski/liquid-picturefill
update naming convention
add IDs to media keys
add IDs to media keys
Merge branch 'master' of github.com:robwierzbowski/liquid-picturefill
Re-organization, note revision, complete outline in picture.rb
Merge branch 'master' of github.com:robwierzbowski/liquid-picturefill
Fixes yaml error