properly nest tsconfig under compilerOptions

[stevekrouse]

This PR was started to emit .d.ts files (#116) but the solution involved fixing other issues with the tsconfig. Basically we were using attributes at the top level that should all be nested under compilerOptions.

Closes #116

[stevekrouse]

What we used to output in the dist folder:

What we output with these changes:

This works as long as you import from the .js file. It doesn't work if you import from the .production.js or the .development.js versions.

[stevekrouse]

I think it's ready to go :)

[janpaul123]

Do we need to update some documentation? E.g. in particular it might be useful to mention how the .production.js vs .js works (by itself, and how the Typescript definitions only work with the .js version)