Add code for tutorial.

p0_tutorial/test_cases/q1/CONFIG

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+max_points: "1"
+class: "PassAllTestsQuestion"

p0_tutorial/test_cases/q1/addition1.solution

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+# This is the solution file for test_cases/q1/addition1.test.
+# The result of evaluating the test must equal the below when cast to a string.
+result: "2"

p0_tutorial/test_cases/q1/addition1.test

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+class: "EvalTest"
+success: "add(a,b) returns the sum of a and b"
+failure: "add(a,b) must return the sum of a and b"
+
+# A python expression to be evaluated.  This expression must return the 
+# same result for the student and instructor's code.
+test: "addition.add(1,1)"

p0_tutorial/test_cases/q1/addition2.solution

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+# This is the solution file for test_cases/q1/addition2.test.
+# The result of evaluating the test must equal the below when cast to a string.
+result: "5"

p0_tutorial/test_cases/q1/addition2.test

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+class: "EvalTest"
+success: "add(a,b) returns the sum of a and b"
+failure: "add(a,b) must return the sum of a and b"
+
+# A python expression to be evaluated.  This expression must return the 
+# same result for the student and instructor's code.
+test: "addition.add(2,3)"

p0_tutorial/test_cases/q1/addition3.solution

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+# This is the solution file for test_cases/q1/addition3.test.
+# The result of evaluating the test must equal the below when cast to a string.
+result: "7.9"

p0_tutorial/test_cases/q1/addition3.test

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+class: "EvalTest"
+success: "add(a,b) returns the sum of a and b"
+failure: "add(a,b) must return the sum of a and b"
+
+# A python expression to be evaluated.  This expression must return the 
+# same result for the student and instructor's code.
+test: "addition.add(10,-2.1)"