RedisValue HasValue property

Add innerexception message in case of a fault 

for 'NOAUTH Authentication required.' recordconnection failure

Default connection timeout to 5 <s>milliseconds</s> seconds

Scripting now correctly returns the correct hash byte[] (half-width), and accepts hashes automatically as either byte[] or naked sha1 string

Fix compilation for MD/XS

SCRIPT eval (when failing due to NOSCRIPT) can retry when using the sync API, since there can be no competing commands (but not via the async API)