Added requirements section in comments for HashiCorp Vault dump example
# Dumps HashiCorp Vault secrets to a Keeper JSON file ready for import.
+# Requirements:
+# pip install hvac
+
# Reads env vars:
# VAULT_ADDR which points to desired Hashicorp Vault instance, default http://localhost:8200
# VAULT_TOKEN vault access token, no default - if empty get token from already-authenticated session
