Clean up examples/ code

[sidiousvic]

Some of code in examples/ was written pretty hastily. It could use some love.

• Remove stray console.logs
• Organize CSS styles and remove unused ones
• Destructure variables where you can (use discretion)
• Organize the file structure for pizza and todo (like in calculator, separate redux, functions into own files)
• Rename vaguely named variables/actions for semantic powerz

よろしく御願いします。

[sidiousvic]

@nayelyrodarte