Updates Fetch Online Data Example for Readability & Adds JavaDoc Comments

[horaciovelvetine]

Hey!

Been using this repo for a personal project and noticed that this example was a little bit lacking. I am a newbie to this toolkit so I'm approaching this with that naiveté - but wanted to propose these changes :)

• Adds Java Doc comments including a list of what each example is doing
• Refactors each of the queries into their own method for clarity and readability
• Adds inline commenting for breadcrumbs
• Clarifies to 4 main examples, while also including the duplicated example cases in inline comments in first 2 cases

Let me know!

[horaciovelvetine]

That last commit adding the functionality to write the results to the results dir was intended to be a separate pull request. By default it is disabled to maintain the behavior of the example, it just allows digging into the results since they can't all be read in a console meaningfully.

Happy to fix/exclude/remove that as you may see fit here, but I found it helpful when I was getting familiar!