Merge pull request #1 from cheung31/themes

Slideshow mode
Fix styling of notification
Remove redundant prev/next buttons. Restyle notification to have back arrow preceding it
Add scaling of content items when the active slide is too wide
Rename #_adjustContentSpacing to #_relayout
Changes to make gallery view compatible with v2.0.0 sdk
Fix bugs
Refactor setElement
Fix bug with notification click handler
Update broken example
Update left margin of notification
Fix selector to retrieve the notification element
Update content-created-at colors
Set a bit to handle animating interruption
Tweak the settimeout delay for allowing the final transformations to apply
Tweak the settimeout delay for allowing the final transformations to apply
Move files around
Hinted
Make configurable thumbnail scale
Add annotations for GalleryView opts