When image titles contain tags, they should not be echoed to the
lightbox title.

The attribute for title and caption are now configurable via the option
array. A caption is usful to give an additional image description or
provide proper attribution. This includes the XSS fix from brutaldesign#268

* master:
  fixed typo in doc
  minified last version
  minified last version
  remove extra spaces
  ensure that afterMedia fires after media is loaded
  add afterMedia setting to fire function after slide is created
  update README and index page for explaining removeBarsOnMobile option
  adding index parameter to callback functions
  Update README
  Allow the selector to be executed every time, so that if new elements have been inserted in the DOM, they are also included
  Updated readme.md