grim/hgkeeper

Changed the policy_effect to the priority model and move the definition of the access function to the policyChanged the policy_effect to the priority model. Also tried to clean up the docs to explain the changel. Also tried to clean up the docs to explain the changes.
package globals
type Globals struct {
ReposPath string `kong:"flag,name='repos-path',env='HGK_REPOS_PATH',default='repos',help='the directory where the repositories are stored'"`
AdminRepo string `kong:"flag,name='admin-repo',env='HGK_ADMIN_REPO',default='hgkeeper',help='the name of the admin repo to create/use'"`
}