Changes to use github.com/howeyc/gopass to read pass

This keeps the password from echoing back to the screen
Merge branch 'add_masked_pass_prompt' of https://github.com/glennsb/drac-kvm into glennsb-add_masked_pass_prompt

Conflicts:
	main.go
t push origin masterMerge branch 'glennsb-add_masked_pass_prompt'