HUE-2398 [fb] Drag and Drop hover message should not appear when elements originating in DOM are dragged

Added dragstart/dragend event listeners to body inorder to determine if dragged elements originated outside DOM
HUE-2400 [core] The CSRF protection breaks some apps

Moved the XMLHttpRequest.send hack outside document.ready
HUE-2395 [search] Broken widget in Solr Apache logs example

Fixed call to a possibly undefined JS method
Fixed z-index of Search Bar
HUE-2401 [search] Visually report selected and excluded values for ranges too

Added labels and css classes
HUE-2373 [search] Heatmap can break

Toggled visibility on Selected dimensions labels
Fixed problem with multibarChart when no data is available
Fixed problem with pieChart when the slices have value of 0
[beeswax] Prevents 'save' overriding a query when only a portion of it is selected
HUE-2404 [oozie] CSRF token missing in rerun popups

Added CSRF token to form with POST methods