Fixes 5370: Uses correct container when adding files through embed.
Minor fix
Merge pull request #5371 from juho-jaakkola/embed-container

Fixes 5370: Uses correct container when adding files through embed.
fixed typos on method name
Fixes #5207 returning false if filename is not set
Merge pull request #5384 from RiverVanRain/patch-1

Minor style fix in twitter-api lib
Merge branch '1.8'
Corrects language URLs for client caching (lost in pervious 1.8 merge)