Convert mdl units

[ateucher]

No description provided.

[ateucher]

Initial work to address bcgov/wqbc#158. Unfortunately it's not very fast (~11 seconds for 5000 rows) due to having to loop over the rows, since {units} isn't vectorized over different units.

[ateucher]

@joethorley I think this is a pretty good solution, one TODO remaining.

[ateucher]

@joethorley @JessicaPenno @KarHarker @j-krogh I am ready to merge this - please have a look if you'd like. See the README for a brief demo of its usage.

[joethorley]

That is very elegant - hats off!

[ateucher]

Thanks Joe!

[JessicaPenno]

Awesome Andy!! I assume that I do not need to review the units table anymore, I have not got to that yet

@joethorley how do we get this into ShinyREMs?

[ateucher]

Thanks @JessicaPenno - no you don't need to review it now :)

[joethorley]

@JessicaPenno - I think it needs to be added to the wqbc functions and then shinyrems will just need tweaking internally to make sure the data goes through this step.