Merge branch 'develop'
updated the sidepanel controller to use a own gesture recognizer that only allow horzontal gestures
change to use the gesture recognizers velocity instead of a self calculated momentum
removed some duplicated code
changed that the left and right views are always added as subview, but where hidden if the menu opens on the opposite side
fixed that the child view of left and right panel uses space in the parent view
Merge branch 'side-panel' into develop