Update README.md

README.md

 # Ol' McFroilan Had a Farm
 * **Objective:** To implement a system indicative of a Farm environment
 * **Purpose:** To demonstrate [multi-inheritence design issues](https://www.geeksforgeeks.org/java-and-multiple-inheritance/)
+* **Prerequesites:** A `UML` approved by an instructor.
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 # Setting the Plot...