Create Goal List items layout

[ktruong7]

• Create the xml layouts for Goal list items
• This layout can be used in both student mode and teacher mode goal fragments

list items should show:

• title of goal
• start/end date
• status: active/completed (Probably better to split the items in the listview to show active on top and completed below, we can implement a filter later too)
• value of the goal marks/points
• Number of students assigned to this goal (nice to have, maybe can be left out for the prototype since I think we don't have a way of determining this easily)