Create the model skeleton

First, we can use the CLI tool to create a model skeleton. credmark-dev create takes the 1st argument as the sub-folder name (github ID could be preferred) and the 2nd argument as the name of the file (model name).
The custom models will be all housed inside folder models/contrib.
We will use "ape" as the name of the sub-folder.
> credmark-dev create ape count
Creating folder models/contrib/ape
Creating file models/contrib/ape/