Feature/scroll (#22)

* base scroll implementation

* add scroll collection example
mofidy scrolls, fix callback calls

* unhover button if start swipe
notify input components on swipe

* add node center offset, calc by pivots
modify with with node center scroll (to correct scroll to point)

* Refactor, add some docs

* fix: set_pos on end on scroll

* add gui.animate speed in settings

druid/base/grid.lua

@@ -83,4 +83,14 @@ function M.get_size(instance)
 end
 
 
+function M.get_all_pos(instance)
+	local result = {}
+	for i = 1, #instance.nodes do
+		table.insert(result,	gui.get_position(instance.nodes[i]))
+	end
+
+	return result
+end
+
+
 return M