added an "isUseRepositoryPermissions" so the admin checkbox in jelly works
Merge pull request #20 from alexrothenberg/admin-checkbox-for-repository-user-permission

added an "isUseRepositoryPermissions" so the admin checkbox in jelly works
A flag to allow authenticated users to create new jobs

Configuration setting for admins to enable/disable "Allow Authenticated to CREATE new jobs"

When enabled authenticated users can CREATE new jobs & then configure jobs to setup the repository so
regular repository level authorization takes effect.