Summary:
Some small improvements to Norwegian numerals:

- Parse powers of ten with spaces as well as dots: `10 000 == 10.000`
- Some more textual powers of ten: `milliard`, `billion`, ...
- Textual numbers from 21 to 99: `tjueen`, `tjueto`, ...
   (they were already parsed with spaces, as in `tjue en`, but not without)
Pull Request resolved: #243

Reviewed By: patapizza

Differential Revision: D9505835

Pulled By: haoxuany

fbshipit-source-id: e42a290b3dd2d5e6a82f00514617b4c3c4dd3416