Revisit prefixed keys to avoid allocations; update MS redis-64 from nuget; update tests; change namespace of keyspace isolation - that was an error

Fixed race condition in PhysicalConnection creation

Make locking *mostly* work with twemproxy (and more generally: without multi/exec if they aren't available)

Make sure the initial cursor/pageOffset are correct (for both enumerable and enumerator) even if not iterated

HLL unit tests

Issue #99: Added HyperLogLogLength that takes array of HLL keys

Fixup the `[InternalsVisibleTo]` (glitched on strong-name version, but not needed);  include Moq dlls - this is purely to make my build-server happy

Key space isolation tests

Minor change to WrapperBase

Merge new stuff

fix minor mistype on comment.

Update KeysScan.md

Add basic tests for keyspace isolation; use polymorphism for Condition re-writing; slight tweaks to wrapper construction (no double-wrapping, for example)

Key space isolation extension to IDatabase