vault.sh/vault.bat should provide a scriptable mode

Currently the vault.sh / vault.bat script can only be run in interactive mode.
We tried scripting vault.sh by redirecting stdin, but that fails due to it using the Java Console class.

This RFE is to add a non-interactive mode, e.g. be able to invoke the vault script with all parameters passed on the command line.

We realise this would expose passwords in plain text, but it is the intention to be able to run this on a private machine and copy the result to the actual deployment box.