[Bug 4872] Make RegistrationForm.getSeminar public and add .getEvent

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/seminars/trunk@82082 735d13b6-9817-0410-8766-e36946ffe9aa
Bump the version number to 0.9.77.

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/seminars/trunk@82083 735d13b6-9817-0410-8766-e36946ffe9aa