Basalt 1.7 Update

- New Objects (Flexbox, Graph, Treeview)
- Pluginsystem to add/remove functionality
- Reworked the entire Object system, instead of one big Object Class we have multiple classes: Object, VisualObject, ChangeableObject
- Instead of one big Frame Class we have multiple Frame Classes: BaseFrame, Frame, MovableFrame, ScrollableFrame, MonitorFrame, Flexbox
- Removed the Animation Object, and added a animation plugin instead
- Removed the Graphic Object and merged it's functionality with the image object
- Updated currently existing objects

docs/objects/VisualObject/setFocus.md

@@ -0,0 +1,20 @@
+# Object
+
+## setFocus  
+
+Sets the object to be the focused object.
+If you click on an object, it's normally automatically the focused object. For example, if you call :show() on a frame, and you want this particular frame to be in
+the foreground, you should also use :setFocus()
+
+### Returns
+
+1. `object` The object in use
+
+### Usage
+
+* Sets the button to the focused object
+
+```lua
+local mainFrame = basalt.createFrame()
+local aButton = mainFrame:addButton():setFocus()
+```