Version 3.6.0 preview

- former update: spoilerbb tag improved
- new features for the bimg tag:
1) can disable the lightbox (option: no-lightbox)
2) can set a parent link, just insert a link in the Bb Code options (it
will automatically disable the lightbox)
3) can compare two pictures thanks to the script twenty twenty:
http://zurb.com/playground/twentytwenty
#To use it, just insert a new img url or img attachment id in the Bb
Code content that will be separated with the first one by |
#If you want to enable the vertical comparaison, just use the option:
diff-v or diff-vertical
#If you want to set the cursor position use the option diff-pos:xx ; xx
being a number between 0 and 1 (0.1 will make the cursor on the left,
0.9 on the right)