UX Rework: Add home page

- Add people section
- Order favourites according to their activities

https://github.com/vector-im/riot-meta/issues/75

Riot/ViewController/RecentsViewController.h

@@ -53,6 +53,11 @@
  */
 @property (nonatomic) BOOL shouldScrollToTopOnRefresh;
 
+/**
+ Tell whether the search bar at the top of the recents table is enabled. YES by default.
+ */
+@property (nonatomic) BOOL enableSearchBar;
+
 /**
  Tell whether the drag and drop option are enabled. NO by default.
  This option is used to move a room from a section to another.