show descriptions for tutorials on chapter partner sites
update congratulations string
add Slovenian language
Added video thumbnail to hourofcode.com.
add language drop down to ro.code.org
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
code.org translations 12/8
Merge branch 'test' into staging
Automatically built.

commit 99942be1fcf8ddf208b6ac0185945e2c2f9d3c63
Author: Tanya Parker <tanyacparker@gmail.com>
Date:   Mon Dec 8 01:38:43 2014 -0800

    code.org translations 12/8
Dropbox and Gsheet changes