JSON comes through as map obviously

we get JSON keys not atoms as errors

added better error handling for empty responses

added a basic readme

added license (fixes #1)

made the vault dev_server script nicer

respond with the full response not just the data section

tests work now and switched to approle authentication

make credo happier

fixed syntax issues

sanitise env variables

made dedicated calls for de/encrypting

working test for encrypting/decrypting data

fixed code + tests so that they pass

trying to get a test suite working