Encouraging doctesting

[WPennock]

Since the tutorial says that doctest should be used for all coding by AguaClara subteams, including import doctest in this might help set the expectation that doctesting is essential.

[HannahSi]

Hi William, by tutorial, do you mean this AguaClara Tutorial page? And would you be able clarify where it would be helpful to include import doctest?

[WPennock]

Hi William, by tutorial, do you mean this AguaClara Tutorial page? And would you be able clarify where it would be helpful to include import doctest?

Hi, Hannah; I'm sorry that was unclear. What I meant was that it could perhaps be included in aguaclara.play so that the doctest package would be loaded by default for most AguaClara coding projects.

[oliver-leung]

I feel that it might not be necessary to include import doctest in our __init__.py file (this has replaced aguaclara.play in that users now run import aguaclara as ac to import these functions), but we can consider adding it as an "install_requires" package in setup.py.