Update documentation and LICENSE

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addons/godot_xterm/nodes/pseudoterminal/README.md

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+# Pseudoterminal
+
+**Inherits:** [Node] < [Object]
+
+
+Can be used with the [Terminal] node to get an actual shell. Currently only tested/working on Linux.
+
+## Methods
+
+| Returns | Signature                              |
+|---------|----------------------------------------|
+| void    | write **(** [PoolByteArray] data **)** |
+| void    | resize **(** [Vector2] size **)**      |
+
+## Signals
+
+- **data_sent** **(** [PoolByteArray] data **)**
+
+  Emitted when some data comes out of the pseudoterminal.
+  In a typical setup this signal would be connected to the [Terminal]'s `write()` method.
+
+---
+
+- **exited** **(** [int] status **)**
+
+  Emitted when the pseudoterminal's process (typically a shell like `bash` or `sh`) has exited. `status` is the exit code.
+
+  For example, if you are using the terminal with a `bash` shell, then issuing the  `exit` command would cause this signal to be emitted.
+  ```bash
+  > exit
+  exit
+
+  ```
+
+## Method Descriptions
+
+- void **write** **(** [PoolByteArray] data **)**
+
+  Writes data to the pseudoterminal. In a typical setup this would be connected to the [Terminal]'s `data_sent()` signal.
+
+- void **resize** **(** [Vector2] size **)**
+
+  Used to notify the pseudoterminal about window size changes. In a typical setup it would be connected to the [Terminal]'s `size_changed()` signal.
+
+
+[Node]: https://docs.godotengine.org/en/stable/classes/class_node.html
+[int]: https://docs.godotengine.org/en/stable/classes/class_int.html
+[Object]: https://docs.godotengine.org/en/stable/classes/class_object.html
+[PoolByteArray]: https://docs.godotengine.org/en/stable/classes/class_poolbytearray.html
+[Terminal]: ../terminal/README.md
+[Vector2]: https://docs.godotengine.org/en/stable/classes/class_vector2.html