Convert chained fAround/findOut/eitherWay to try/catch/finally

[MaoShizhong]

Closes #60

#88 Has been untouched for a long time and also looks like it doesn't fully cover the desired conversion.

The function/callback syntax was chosen because even though this could be handled by the pre-parser (to allow faround {} findout {} eitherway {} syntax), that would require additional logic to determine if inside a comment so that only intended keywords are substituted. The current approach feels easier to reason about.

This PR

• Converts chained fAround, findOut and eitherWay functions (eitherWay is optional) to try/catch/(finally) - if not chained then they are treated as normal function calls.
• Adds tests for conversion.
• Updates example/compiled/README files with examples.

[christina-de-martinez]

Okay ik I'm exceedingly lame for this but I decided I sort of want to keep it PG; could we change it to fAround/findOut/eitherWay? I'm happy to push something up to your branch if you don't feel like doing it. Otherwise this looks great! Awesome work. @MaoShizhong

[MaoShizhong]

No problems keeping it PG, probably a more sensible decision :P I'll change it up later when I get the chance!