Update 'README.md'

README.md

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 # PhoneBook Lab
 
-* Fork and clone this repository to complete your lab. Submit each part with a Pull Request for a separate branch.
+Write the classes needed to implement a very simple PhoneBook. 
+
+* Fork and clone this repository to complete your lab. Submit with a Pull Request.
 
 ## Unit Tests
 
 * You are expected to write unit tests for your code.
+* You must have a Test class for every class you write.
 * Be sure to write the tests before implementing the functionality being tested.
 * Tests must be thorough and address all possible paths through each method.
 
 ## Submission
 
-* Your completed lab must be submitted via GitHub.
+* Your completed lab must be submitted via git pull request from your own fork.
 * Labs are not complete unless they include UML diagrams of all implemented classes, as well as unit tests for all features.
 
 ## Instructions: