Enhanced implementation of SwipeInterface
Various code-style and best-practices updates
Fixing variables names, due to previous commit
Added DoubleTap listener and whole new ImageZoomActivity (with PhotoView
library)
Added zoom menu item
Changed icon for zooming image
Added zoom function to context menu of favorites
Context menu on favorites now for single click too
Raised version, as zoom function is ready to use
Removed DoubleTapListener, as we don't listen to double taps
Fixed naming, according to style of zoom (no more double-tap)
Added hint for zooming, in all languages