add script for manually building old plugins - for plugring

git-svn-id: http://farmanager.com/svn/trunk@10031 72235d2c-c60c-0410-a47a-a0032694dc5d
add 7z creation

git-svn-id: http://farmanager.com/svn/trunk@10032 72235d2c-c60c-0410-a47a-a0032694dc5d