Various upgrades, bumping to version 0.2.0

[ndarilek]

These commits do a number of things:

• Expose all remaining Tolk functions.
• Make screen reader detection return an Option<String> to handle the null case, which currently crashes consumers.
• If someone explicitly requests to speak or Braille text, don't fall back on output. Let's stick with the library's behavior on this one.
• Use Into<String> everywhere &str was expected before, thus allowing any string-like value.
• Add an example.
• Update README.md and bump version.

I probably missed a few things, but the example works on my system, and I'll be actively using this crate for the time being. So if anything was missed, I'll attempt a fix and push out a change.

Thanks!

[darbaga]

Merged! :)

I published both the crates, too. Seems to be working fine. Thanks so much for working on this--I don't think the project would've got anywhere otherwise. Barring major Tolk upgrades, I don't think there need to be many more changes (although if you think of any, please feel free to send a PR and I'll publish as soon as possible).

Good luck on your future projects!

[ndarilek]

Excellent, thanks! I might eventually remove the method syntax since Tolk itself seems to be a singleton, but I'll save that for a 0.3 in the future.