groupchat modifications:

- change room association of users
- added more icons for roles (owner,admin,member)
- changed old role icons

added new localized strings: 
menuitem.revoke.member = Revoke Membership
menuitem.revoke.admin = Revoke Admin
menuitem.revoke.owner = Revoke Ownership
menuitem.grant.member = Grant Membership
menuitem.grant.admin = Grant Admin
menutiem.grant.owner = Grant Ownership
menuitem.affiliation = Affiliation

git-svn-id: http://svn.igniterealtime.org/svn/repos/spark/trunk@12247 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/spark/UserManager.java

@@ -148,6 +148,22 @@ public class UserManager {
         }
         return false;
     }
+    /**
+     * Checks if the Occupant is a Member in this Room<br>
+     * <b>admins and owners are also members!!!</b>
+     * @param occupant
+     * @return true if member, else false
+     */
+    public boolean isMember(Occupant occupant) {
+	if (occupant != null) {
+	    String affiliation = occupant.getAffiliation();
+	    if ("member".equals(affiliation) || affiliation.equals("owner")
+		    || affiliation.equals("admin")) {
+		return true;
+	    }
+	}
+	return false;
+    }
 
     /**
      * Checks to see if the Occupant is a moderator.