Changes

make documentation for and do the tasks below:

'''Creating groups'''

To create a group, follow the same steps as above but instead of right click new->user select new->usergroup and give it a name. once the group is created, click on the group-> a window will pop up with details of the group. Go to members tab-> Add and enter the name of the user to add and click on checknames which will confirm the user name. This will give an error if no user by that name exists. We can also add other groups as members of a group. If we do that,all members of the added group will inherit the properties of group to which we add.