Updated docs

There is still stuff to do

docs/objects/Object/onDrag.md

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+# onDrag
+`onDrag(self, event, button, x, y, xOffset, yOffset)`<br>
+The computercraft event which triggers this method is `mouse_drag`.
+
+Here is a example on how to add a onDrag 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 buttonOnDrag(self, button, x, y, xOffset, yOffset)
+  basalt.debug("Someone drags me (i know i wont reposition myself)!")
+end
+button:onDrag(buttonOnDrag)
+```