Initial planning for new week 5 headings

Author: EdmundGoodman

week5/README.md

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+In our fifth week, we will cover:
+
+Current:
+
+- Programming practices
+- Expect everything
+- A comprehensive description
+- Bonus Tasks
+
+Suggestion sketch:
+
+- A very brief introduction to objects
+  - What is an object?
+  - Properties and methods
+  - Exceptions as an example of objects?
+  - There's more?!?!???!
+- Using libraries
+  - The `import` keyword
+  - Finding libraries
+  - Doing useful(-ish) things
+    - Example one
+    - Example two
+- Readability counts
+  - Why bother?
+  - Tips for readability