Updated Responsive Lightbox

- Cleaned up demo files and added all styling inline index.html example
/ demo
- Added keyboard shortcut navigation (left and right arrows)
- Added click state to the background overlay for closing lightbox
- Updated indentation, naming and classes
TO DO
- Add swipe support ?
- Add preloader when image is being loaded
- Fix IE7 support
Fixed IE Support

- Fixed IE7+ Support
- Added preloader
Merge pull request #1 from matthewhartman/master

Updated Responsive Lightbox