Pressing 'b' while viewing an answer now opens it in the browser

[goibon]

When viewing a list of answers in interactive mode you can press the 'b' key to open up the highlighted answer in your browser. I added that very same behaviour for when viewing a single answer in interactive mode.

As an aside: I noticed that at one point require('openurl') is wrapped in a try-catch, while a few lines later it isn't. I was unsure which pattern you preferred so I just picked one, but let me know if you prefer the other and I'll gladly update my PR.

[PaoloCifariello]

2 years later..

This is great, thanks @goibon 🎉🎉

[goibon]

Hey, better late than never 😉