Bindings are broken since jQuery 1.9

Replace .live with .on
.live is deprecated since jQuery 1.7 and was removed in 1.9
.on is available since 1.7 which was released in November 2011. Should be long enough to replace it without backwards compatibility
Changed method for calculating the window height

In scroll pagination, the previous method miscalculated the window height which resulted in loading every single object to be paginated without reaching the scroll margin
Adding option to add extra css class name to show more button
Forgot to add class_name parameter return value in last commit