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/Image/getMetadata.md

@@ -1,9 +1,23 @@
 ## getMetadata
+
+### Description
+
 Returns the metadata set in the image
 
-#### Parameter:
+### Parameter
 
 1. `string` the metadata key (for example: title, description, author, creator, data, width, height,...)
 
-#### Returns:
+### Returns
+
 1. `any` metadata value
+
+### Usage
+
+* Load an image and get the metadata for the "title" key
+
+```lua
+local mainFrame = basalt.createFrame()
+local aImage = mainFrame:addImage():loadImage("test.bimg")
+local title = aImage:getMetadata("title")
+```