Updated docs

There is still stuff to do

docs/objects/Object/onScroll.md

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+# onScroll
+`onScroll(self, event, direction, x, y)`<br>
+The computercraft event which triggers this method is `mouse_scroll`.
+
+Here is a example on how to add a onScroll event to your button:
+
+```lua
+local basalt = require("basalt")
+
+local main = basalt.createFrame()
+local button = main:addButton()
+  :setPosition(3,3)
+  :setSize(12,3)
+  :setText("Click")
+
+function buttonOnScroll(self, direction, x, y)
+  basalt.debug("Someone scrolls on me!")
+end
+button:onScroll(buttonOnScroll)
+```