getDragEdge() doesn't reflect StyledAttribute

Bug Found When Testing:
https://github.com/jpshelley/AndroidSwipeLayout/blob/create_test_suite/library/src/test/java/com/daimajia/swipe/SwipeLayoutTest.java#L54

Should getDrageEdge() reflect the StyledAttribute if applied here:
https://github.com/jpshelley/AndroidSwipeLayout/blob/create_test_suite/library/src/main/java/com/daimajia/swipe/SwipeLayout.java#L88

expected: if dragEdgeChoices is DRAG_LEFT then getDragEdge() equals DRAG_LEFT
actual: if dragEdgeChoices is (DRAG_LEFT or DRAG_TOP or DRAG_BOTTOM) then getDragEdge() equals DRAG_RIGHT

if so I will update the variable in my testing branch.