Version 2.2.0-beta.3 release

Bu fixes -

• Hide captions div when it is empty
• Youtube videos not working... #1101 (This was happening when enableDrag is false and enableTouch is true and video poster is provided)
• Vertical position of the prev/next controls "incorrect" - not centered #1045

Breaking Change

This release changes the HTML structure a little bit -

• class .lg has been renamed to .lg-content and lg-inner and controls have been
  moved inside .lg-content. This will affect your existing setup only if you have made any customization
• Settings width and height have been removed