Added various things

Custom actionBar *(to support L navigation drawer style)*.
SuperListView *(for pull down to refresh style)*.
NumberProgressBar *(new style to show progress instead of simple progress view)*.
Various other changes.

**ToDo:**
Add refresh button below Student details *(like in material design guidelines)*.
CardView for listItems like in Google Keep / Now.
Many other things.
Working on to-do's.