remove volunteer translator form, use mailchimp one only
Dropbox changes.
add croatian to supported languages
add Croatian to supported lang gsheet
code.org translations 12/16
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
Update code.org elementary logo & studio.code.org course1 logo (both same image) to have Scrat.
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
Automatically built.

commit b4c61acef8b23df34edb3c04e8068a8238733c13
Merge: b9c2eac fe2063c
Author: Tanya Parker <tanyacparker@gmail.com>
Date:   Tue Dec 16 11:07:53 2014 -0800

    Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging

commit b9c2eac3b90387a7a51724907ac84e3d82f4bc33
Author: Tanya Parker <tanyacparker@gmail.com>
Date:   Tue Dec 16 11:07:50 2014 -0800

    code.org translations 12/16
Merge pull request #867 from code-dot-org/staging

DTT