Release procedure

/tangra_lib/lib/tangra2.inc.php - change version to current release version
/VERSION.txt - change version to current release version
update changelog.txt files
Regenerate API reference (if needed) and copy it into /tangra_lib/docs/api_ref. Copy it on tangraframework.net also (consider to remove api ref from svn - it is generated, does not belong in svn)
Add version group to bug tracker
create and test release file
perform smoke test
release using sf.net
announce new release on tangraframework.net and tangra-announce@lists.sourceforge.net