Merge pull request #11 from cfogrady/SecretsRepo

Add Secrets Repo Using a Proto DataStore

Merge pull request #10 from cfogrady/APK_Import

APK Import

Implement Secrets Repository

Add proto plugin and dependencies
Create Secrets Proto
Create Secrets Proto DataStore
Replace old secrets with proto secrets
Fix importers and tests to use new proto secrets.

Verify Secret correctness as part of loading.

Improve tests

Import APK in tests

Initial commit