Document Snake object

[Northern-Web]

Write documentation for the snake object, using GitHub Wiki.

[Northern-Web]

Looking for help to complete the documentation of the snake object's current state. The snake object documentation has partially been added onto.

Documentation needs:

• Constructor
• Constructor parameters
• Object properties
• Object methods

Please have a quick read thorugh contributing guidelines before any contributions are made.

If there is any question, please do not hesitate to let me know!