Enemies and Map changes

In this release I implemeneted enemies that spawn on top of flat circles around the map. The last enemy also drops a key which can be used to break down the doors. I reworked the map to a dock setting with wooden props and a water material below. I reworked the door blueprint and replaced the boring block with a barricade to fit the theme. I also reworked the player to be a different model from the Fab store.