Update JDFPeekabooCoordinator.m insets logic
Update JDFPeekabooCoordinator.m insets logic

As described in issue #18, don't update scrollView contentInsets or scrollIndicatorInsets if bottomView isn't set.  Otherwise insets.bottom get set to 0, which causes the last row of the scrollView to potentially be hidden behind bottom bar (UITabBar, for instance).
JoeFryer/JDFPeekaboo,JoeFryer/JDFPeekaboo