Merge pull request #236 from ervee/lang-nl-update-20140717

Lang nl update 20140717
Added IMAP body text limit
Small fix
Experemental Plain2Html/Html2Plain convertor (+ jQuery linkify)
Fix "poppassd-change-password" plugin (Closes #249)
Additional headers
Added "postfixadmin-change-password" plugin (#251)
cUrl FollowLocation workaround
Small fixes
Update reply subject function
Added "determine_user_domain" setting
Experiments with RSA encryption
Experiments with RSA encryption
Trying different sso type (PHP) for ownCloud package
Update ownCloud package
Google Drive (first look)
Fix Firefox  password autofill issue (Closes #229)
Google Drive (second look)
Added Google Drive support
Small fixes