They'll be released as part of the version 1.4 beta, scheduled for May. In the meantime, you can get your hands on the latest build here but please note that this is bleeding edge, completely unsupported, and may well contain serious bugs. For most users I recommend waiting for the beta.
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above is the official reply from admin (gidgreen) to the similar question asked before: http://www.question2answer.org/qa/5913/answered-when-features-version-become-available-download
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