Updated docs

There is still stuff to do

docs/objects/Object/isVisible.md

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+## isVisible
+Returns if the object is currently visible
+#### Returns: 
+1. `boolean`
+
+#### Usage:
+* Prints boolean visibility of object to debug console
+```lua
+local mainFrame = basalt.createFrame()
+local aButton = mainFrame:addButton():setSize(5,8)
+basalt.debug(aButton:isVisible()) -- returns true
+```