c276a31b9c
**Summary:** This adds support for the MultiDiscrete observation spaces, the same as what exists in the ADSP branch. The observation space is now configurable in the same way as the action space- by selecting a config item within the laydown config yaml. The 'box' option has the same behaviour as before. **Test Process:** I added two integration tests to ensure that creating the environment is possible with both types of observation space. I also checked that all existing unit tests run fine as long as I update the observation space in the yaml to box. **Other comments:** I also updated the documentation relating to observation spaces, please check if the explanation makes sense. Related work items: #1463