Summary:
Hi, in this pr:
* Added time dimension to Arabic language, thanks to Hussein-Dahir & Yazeed-Obaid for writing time corpus.
* Fixed some bugs in numeral & ordinals and added more test cases for them.
Also, I don't really understand why do we use classifiers in time dimension?
Closes https://github.com/facebook/duckling/pull/123
Reviewed By: blandinw
Differential Revision: D6583313
Pulled By: patapizza
fbshipit-source-id: f7acdef0c032d7b7fd7d224832fdaf484d2df825