Created backImg directive
Added goToSinglePhoto to galleryCtrl so that clicking on an image will go to the singlephoto view
Added logic in gallery.html to allow for clicking on a div to lead to singlephoto view - used backImg directive. Also added hover logic on each div.
Modified main.css so that gallery view displays each image as a 300x300 block. Also floated each div element to achieve masonry type behavior. Also cleaned up hover logic for each div.
Added backImg directive to index.html
Merge pull request #76 from AltitudeHK/galleryTiling

Created div images for gallery view.