Fix itemstack:add item not working correct
Higher resolution menuheader
Add ObjectRef.hud_set_hotbar_itemcount and add TOCLIENT_HUD_SET_PARAM
Fixed wrongly named invref:get_location() table members for nodes.

Makes the result compatible with the minetest.get_inventory(location) param.
Bugfix: Update formname on showing new formspec while already one shown
Merge 'upstream/master' into minemovie