Add ThreadPool and CPU summary to connection related errors.

Add server endpoint and key hashslot to debug info for errors

Fixing Documentation for ConfigurationOptions.Proxy

Update PipelinesMultiplexers.md

Correct Concurrency section code example

Fixed typo in IProfiledCommand.ElapsedTime

Acted on a parenthesis that was not closed

Merging Core-RTM

Fix typo

Remove password from logging of configuration string.

Surface better error instead of MOVED errors during a network disconnect in redis clusters 

Updating to allow the creation of RedisResults for mocking

Work around build issue for existing csproj's

Visual Studio tooling will use project.json to restore nuget dependencies
when it finds one beside .csproj. This change uses more specific
<project name>.project.json to specify dependencies.

Use the supplied flags when selecting a server to subscribe to

SUBSCRIBE and PSUBSCRIBE are not write ops and can be
performed on slaved instances, so there's no reason to
explicitly pass DemandMaster when selecting the server.

Instead, use the CommandFlags passed as the parameter to Subscribe()