Activate controls on 'touchstart for touch devices
Activate controls on 'touchstart for touch devices

Fix for #49
(cherry picked from commit 9d10973)

imjalpreet/gallery,tahaalibra/gallery,viraj96/gallery,desaintmartin/gallery,owncloud/galleryplus,setnes/gallery,setnes/galleryplus,patman15/galleryplus,setnes/galleryplus,IATkachenko/gallery,imjalpreet/gallery,interfasys/galleryplus,interfasys/galleryplus,setnes/gallery,IATkachenko/gallery,owncloud/gallery,owncloud/gallery,leftees/galleryplus,desaintmartin/gallery,IATkachenko/gallery,setnes/gallery,patman15/galleryplus,interfasys/galleryplus,tahaalibra/gallery,owncloud/galleryplus,viraj96/gallery,efueger/galleryplus,desaintmartin/gallery,viraj96/gallery,efueger/galleryplus,tahaalibra/gallery,patman15/galleryplus,owncloud/gallery,owncloud/galleryplus,setnes/galleryplus,imjalpreet/gallery,leftees/galleryplus,leftees/galleryplus