GetCheckPassword will prompt for a password twice to verify they match (for creating a new password).

GetConfirmation will request user give the confirmation from stdin.

GetPassword will prompt for a password one-time (to sign a tx) It enforces the password length.

GetString simply returns the trimmed string output of a given reader.

PrintPrefixed prints a string with > prefixed for use in prompts.

MinPassLength is the minimum acceptable password length.