Bugs fixed:
- Fixed #729282, Fix opening contact list after launching empathy -h (Balló György)
- Fixed #752938, Leak fixes for telepathy-accounts-widgets (Christophe Fergeau)
- Fixed #755707, Don't hard code the name of the pkg-config binary (Saleem Abdulrasool)
- Fixed #756165, Call the finish method only once (Pranav Kant)