getting course image from backend
1.changing navigation structure with pagetabStrip 
2.changing color to holo dark theme dark grey and grey
3.dealing with more than scenareo when internet connection is lost 
4.dealing with text of updates 
5.changing the image loader and using PIcasso
6.adding catagories to drawer with icons 
7.supporting rtl for > 4.2 with drawer 
8.for <4.2 the navigation is swiping and a spinner 
9.adding real roles for teachers inorder to sort thim
10.deleting some non used code and files