logo change; fragmentize restaurant_list; other formatting

**Updates:**
1. changed logo & submit icons;
2. fragmentized `RestaurantList`;
3. replaced text view rating with rating bar;
4. other small twists such as `textColor`, `actionBar`, etc.

**Issues:**
1. `restaurant_list_container` is constrained in a smaller size than parent;
2. rating bar is showing more than 5 stars even set with `numStars = "5"`;
3. lost tracking of original files therefor branch comparison is showing extra additions of some old files.