* new: Issue #31 - Missing Typescript Definition

[nCore]

Added Typescript Definition.

[AriaMinaei]

Thanks for the good work! Since I don't use TS atm, I can't really test this. But if you think this PR is good enough to merge, I'll do it ;)

So, let me know.

[nCore]

That's the question for @radarsu ;)

[radarsu]

The definition is great! Thanks!

[AriaMinaei]

Merged and published. Thanks for the good work :)

[testerez]

@nCore @radarsu: How are we supposed to use the definition in a typescript project?
(I'm using typescript@2)

[radarsu]

After you install pretty-error you have to import it like this:
import PrettyError = require("pretty-error");

If typescript compiler will underline "pretty-error" and say it has no definition (or something alike), then you should add to package.json of pretty-error module:
"typings": "index.d.ts",
After that typescript compiler should be able to find definition. I am using atom editor and typescript 2.1.0 though.

[testerez]

In fact, I'm using ts@2.0.3 (current stable release) and the reference in package.json seams to be required. I just made a PR #36