Add primitive CLInput functionality to InvTest

TODO
*Fully design InvTest methods
*Implement complete design
Reset InvTest to redo based on fuller design
Add getChar method to StdCLInput
Add more full CL interface to InvTest

contained within net.jnickg.dnd.io.inv package
	*Now includes two levels of menus
		Main menu allows user to load an Inventory, standard libraries, etc
		Inventory menu allows user to manipulate a loaded Inventory

TODO
	*Complete the enum commands, etc. (won't work until completed)
Merge pull request #20 from jnickg/invCLI

Inv cli
Merge pull request #21 from jnickg/invPackage

Inv package