Add -ZipFolder to support extracting a specific relative path from inside package files
This is to support using standard archive/master.zip files from github by specifying which folder has your module in it.
Refactor calculation of the FindCommands to wrap Import-Module and avoid duplicate work
Add support for Module-master type zipfiles (e.g. source archives from GitHub).
Add PSReadLine as an example of how to use ZipFolder, and Pester as a worst-case example.