check connection before reading. Fail if unable to connect
Tell a user that they can use the extant cache to write
better grammar
It's an error not a warning, and suggesting that DB settings are at fault
Merge pull request #27 from llimllib/llimllib-better-cache-message

Tell a user that they can use the extant cache to write
Merge pull request #26 from llimllib/llimllib-fail-early-on-invalid-db

Check connection before reading. Fail if unable to connect