Issue #2170005 by AjitS, xiukun.zhou: Warnings when jQuery carousel is not present or it doesn't have skins

* 7.x-1.x:
  #2007618, recommend to download imagesloaded 2.1.2 until jquery_update gives possibility to use jquery 1.9
  Issue #2043641, php errors if libraries_get_path(jquery.jcarousel) is not defined
  image url post drupal 7.20, fix #1929228

#2007618, recommend to download imagesloaded 2.1.2 until jquery_update gives possibility to use jquery 1.9

remove the slideshow_height setting which was added for file and video support. The height is calculated by javascript

fix an issue in js if there are more than 1 slideshow. The error was in options.before and was related to the settings variable. The issue was visible only if one of the slideshow had a carousel pager