re #372  users newer than 2 weeks cannot send more than 5 messages per day. sent messages in trash are also counted just in case a new user deletes sent messages

git-svn-id: https://subversion.assembla.com/svn/tatoeba2/trunk@2031 e0e46c49-be69-4f5a-ad62-21024a331aea
Turn sentence references within comments into URLs. Fixes #249
Main sentence menu: add button to record audio
Finish dumb part of recording form
Add audio recording support
Recording upload support