* updated examples.
 * fixed position of lightbox on small screens.
 * fixed carousel unclickable on mobile phones.
 + added gitignore.
 + added sortable.
 * fixed an error in sortable.
 * updated chanzhi js imports.
 * added search_keys to chosen, type and search extra keys in chosen.
 * fixed errors in droppable.js.
 * added 'reset' method to sortable.js.
 + added event api: 'finish'.
 * fixed error in sortable.js.
 * updated chosen.
 * rebuilt.
 * updated chanzhi imports.
 * updated zentao theme.
 * fixed icon names.
 * fixed errors in droppable.js.
 * rebuit.
 * change droppable option: target option can be a function.
 * update readme: change project website adress.
 * updated documents.
 * changed version.
 * updated project website address.
 + added CHANGES.md.
 * rebuilt.