Fixed bug causing columns to be z-sorted in the wrong direction.

Closes #2941
Better fix for #2928
Better ratio for some demos
Fixed #2945, a regression causing pie data label formatter to be ignored unless the format option is set to null.
Compacted fix for #2930
Fixed #2951 causing JS error when updating a series from candlestick to OHLC.
Highstock: Added pointer cursor to the range selector buttons to signalize that they are clickable. Closes #2937.
Demo optimizing
Demo: new Highslide paths.
--- Highcharts 4.0.1 / Highstock 2.0.1 official release ---
Cleaned up
Fixed #2954 that caused invalid SVG attributes on animating in and out grid lines when running older jQuery versions or the Standalone Framework.
Demo: Wrong file path
Fixed #2962 causing data labels on gauges not to display unless defer is set to true.
Applied naming convention of components for download builder
Added missing Solid Gauge module to the highcharts-modules.files configuration
Added missing stacking dependency for Waterfall series
Fixed #2963 where columns were badly drawn in Chrome due to a rendering bug.
Removed comments, added some demos.
Closes #2968 3d columns not drawn correctly when equal to max

Instead of recalculating shapeargs.y the old value is now stored and
reused