Add linebreaks.
Add list of changes in 0.12
Clearer explanation.
Bump version number to 0.12
Latest translations from Transifex.
Revert "Assume that format will be specified in the url requested, or default to HTML. Fixes #989."

This reverts commit c1b3324922687778b316ee1a180582013bcf6d0e.
Remove notes for c1b3324922687778b316ee1a180582013bcf6d0e, it was reverted in 9452a2e5fffd35be383250ada139b349a5866acb as it causes ajax requests to be refused in the new request process.
Merge branch 'release/0.12' into rails-3-develop