Update README.md

[sr42-dev]

The following items need to be added ...

• Resources for turtlesim under day 2.
• Appropriate tasks and resources for day 3.
• Appropriate tasks and resources for day 4.
• Appropriate tasks and resources for day 5.
• Appropriate tasks and resources for day 6.
• Expand on the tasks for day 7 and their requirements.

All of these are from the non-CV item perspective. Feel free to delete any CV task to make space.

[sr42-dev]

@HeadlessReaper