Releases for NG Lightbox

Changes since 8.x-1.0-beta1:

A new release to fix a break in core in 7.38.

1. Issue #2650728: Add additional parameter to AJAX success callback by benjy, broadway, Mattie: Add additional parameter to AJAX success callback

1. Fixed admin path settings, the lightbox can now be disabled in the admin.
2. Issue #2506093: Improve markup and default styles. by Sam152: Improve markup and default styles

1. Remove padding from CSS because we have no icons.
2. Increased default max width to 800px
3. Don't rely on #content to inject the lightbox. Now works with Panels out of the box.
4. Added a README with some basic setup instructions.
5. Added a configure link to the info file.
6. Allow the default CSS to be disabled.
7. Added initial test coverage for basic features.
8. Validation for non-POST requests.