Add Discussion of `make_directory` versus `mkdir`

[rwxrob]

Need to add a significant discussion about the use of speakable commands versus aliases that are short to type. For example, saying, "make underscore directory" will easily match "make_directory" using Google voice from a phone. The same is not true for using dashes and separating out the words, which turns everything into a subcommand of make.

We need to get importable command modules that have multiple words (ex: "make directory") working. That way someone could create a cmdbox-make-directory and another could create cmdbox-make-temp-directory and have them both work (with their obvious short forms).