Add create-vault command & rename delete-vault command

When building API's and CLI's I prefer to build my commands to be
have reciprocal names, this way documentation isn't necessary to
understand what a command does, exactly.

Google agrees (enjoy, it's worth the entire hour!):

How To Design A Good API and Why it Matters
https://www.youtube.com/watch?v=heh4OeB9A-c
Reorganize command functions so they are always in one order

upload
delete
download

create-vault
delete-vault
inventory
info
list
Use consistent style

Example:

private String myFn(String myString, String anotherString) {
	// Some code

	return anotherString;
}
Update and clean up README.md
Merge pull request #23 from winny-/createVaultAndStyle

Create vault and use a single Java style