Support terminal auto-complete

[nemec]

Add support for auto-complete in the major terminal emulators (Powershell, Bash). May have to be a separate tool integrated into the build process since the completion scripts are often separate files.

https://blog.jcoglan.com/2013/02/12/tab-completion-for-your-command-line-apps/
http://stackoverflow.com/questions/25823910/pscmdlet-dynamic-auto-complete-a-parameter-like-get-process
http://stackoverflow.com/questions/33132028/powershell-binary-module-dynamic-tab-completion-for-cmdlet-parameter-values