remove RPS from exercises
add a basic stubbing example
Wrote tests fo Exercise 0 and added Exercise 0 method.
Refactored code for Exercise 0 method
Wrote test for Exercise 1, wrote method for Exercise 1.
Wrote successful test and method for Exercise 2.
Wrote successful test and method for Exercise 3
Wrote test and method for Exercise 4
Added test and method for Exercise 5
Refactored code for Exercise 6 test to test for stdout
Added tests and method for Exercise 6
Added test and method for Exercise 7
Added tests and method for Exercise 8
Added methods for Exercises 8, 9. 10, and Extensions