Add aggregate initialization

docs/tut/crash-course/2-creation.md

@@ -54,3 +54,17 @@ create "TextButton" {
     end
 }
 ```
+
+You can also use a form of aggregate initialization to create datatypes instead
+of explicitly typing out the class name and constructor.
+
+```lua
+create "Frame" {
+    AnchorPoint = { 0.5, 1 },
+    UDim2 = { 0.5, 0, 0.5, 0}
+}
+```
+
+When a property is assigned a table, Vide will inspect the type of the property
+being assigned to, and call that type's default `new()` constructor with the
+values from the unpacked table.