Merge pull request #1 from asQuirreL/dev

Lesson 2: If and While Statements
Added Ashok to Contributors
Added user input and average
Merge pull request #2 from jamesthomp/dev

Added user input and average
Changed user input to avg_percent and for loop
Editorial changes and added type information about `bool`
Merge pull request #3 from jamesthomp/dev

Changed user input to avg_percent and for loop
Merge branch 'dev' of github.com:oxcompsoc/www-content into dev
Editorial changes to user input
Removed rubbish at start of file
Initial Headings for lesson 3
updated headers
Lesson 3: Ashok's sections.

 * What is a Text-Based Adventure Game?
 * Structuring the Game
 * A Starting Point