Update Part II: HelloWorld.md
Update Part VI: Text Fields.md
Update Part II: Printing.md
Update Part III: Variables.md
Update Part IV: Arithmetic.md
Update Part VI: Arrays.md
Update Part I: MyFirstWindow.md
Update Part II: HelloWorld.md
Update Part III: Buttons.md
Update Part IV: Temperature.md
Update Part V: Layouts.md
Update Part VI: Text Fields.md
Merge pull request #36 from BillsJ/patch-3

Update Part II: HelloWorld.md
Create Part VIII: Listeners.md
Update Part VIII: Listeners.md
Merge pull request #37 from BillsJ/patch-3

Create Part VIII: Listeners.md
Update Part VIII: Listeners.md
Update Part VIII: Listeners.md
Update Part VI: Text Fields.md
Update Part VII: Loops.md