Add hmac check to keys encrypted with a passphrase derived key
prevent check_dependencies from choking on build numbers
make redis version check in check_dependencies more strict
Merge pull request #253 from SpiderOak/fix_redis_version_check

Fix redis version check
Merge pull request #252 from chiiph/feature/verify_rest_of_keys

Add hmac check to keys encrypted with a passphrase derived key