[seam-dev] JIRA permissions update

Max and I discovered a way to change the permission scheme for a project to correctly reflect the project members. The main change you will see is that: * even if you are a member of the committers group, you no longer have committer privileges on the project - if I forgot to add you to the list of project committers, then please ping me * the assignee list is now limited to the list of project committers :-) * more people now have admin rights (ability to add releases and components)