Number to String

Using python, produce a library that has the following capability within it:

given some integer (N) as an argument, return a string representation of that integer.

For example, using the capability in the python REPL (implemented as a function called int2str) may look like this:

>>> int2str(5)
'five'
>>> int2str(55)
'fifty-five'

As a part of the submission, treat the library as though it were an API (which may have new capabilities in the future) that will be used within an organization for production use. Given that, it should include an appropriate level of professional cleanliness that you would stand behind for a published library.

For the purpose of this problem, the solution should actually solve the problem, rather than purely delegate to another library to do the heavy lifting (such as inflect). While dependencies are permitted, the implementation of the solution should be thoughtful in the dependencies it brings in.

As far as the workflow for submission:

1. Create a branch, using a branch name you feel is appropriate.
2. Once you're satisfied with your solution, create a pull request against master