Removed Port and rename Host to ConnectionString as StackExchange.Redis connection is multiplexed and can receive multiple servers.
Moved serializers with external dependencies to their own libararies and packages.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/TagCache.Redis.Tests/Serialization/ProtoBufSerializationProviderTests.cs
Merge branch 'master' of https://github.com/fnicollier/TagCache.Redis into fnicollier-master
Merge branch 'fnicollier-master'
Cleaning up assembly references