v1.1.237-246

* Implemented all remaining PyNumberMethod methods for the C `Colour` class
* Changed the `Colour` class's `__round__()` method to round up to 255 when the colour value is greater than 127,
compared to the previous 128
* Updated the link to the goopylib Colour doc in the `Colour` class's `__dir__()` function
* Defined the `__dir__()`, `__round__()`, `__reversed__()`, & `__contains__()` functions for the C `Colour` class

* Added a separate  `__contains__()` method for the `ColourHex()` class
* Fixed the `Colour_richcompare()` method of the C `Colour` class for the `==` & `!=` operations
* Renamed the `update_values()` method of the `Colour` classes to `__update_values()`
* Fixed circular import with importing the `Window` while important the `GraphicsObject` module without importing the
`Window` module yourself

* Fixed issue with incorrectly named module import in `goopylib.sound.waves.py`
* Fixed error with the `Window` class incorrectly initializing because the root wasn't updating, see
https://stackoverflow.com/questions/34373533/winfo-width-returns-1-even-after-using-pack

Author: BhavyeMathur