short description of different PrivilegeTypes added

model/src/main/java/lcsb/mapviewer/model/security/PrivilegeType.java

@@ -4,12 +4,12 @@ import lcsb.mapviewer.model.Project;
 
 public enum PrivilegeType {
 
-  READ_PROJECT(Project.class, ""),
-  WRITE_PROJECT(Project.class, ""),
-  IS_ADMIN(null, ""),
-  IS_CURATOR(null, ""),
+  READ_PROJECT(Project.class, "View project"),
+  WRITE_PROJECT(Project.class, "Modify project"),
+  IS_ADMIN(null, "Admin"),
+  IS_CURATOR(null, "Curator"),
   IS_ANON(null, ""),
-  CAN_CREATE_OVERLAYS(null, "");
+  CAN_CREATE_OVERLAYS(null, "Can create data overlays");
 
   private Class<?> privilegeObjectType;