Fix bug where unhandled error replies confuse the parser.

Fix bug where subscribe commands would not handle redis-server startu…

…p error properly.

Some bug fixes:

* An important bug fix in reconnection logic.  Previously, reply callbacks would be invoked twice after
  a reconnect.
* Changed error callback argument to be an actual Error object.

New feature:

* Add friendly syntax for HMSET using an object.

Remove warning about missing hiredis. You probably do want it though.

Support for multiple response parsers and hiredis C library from Piet…

…er Noordhuis.

Return Strings instead of Buffers by default.
Empty nested mb reply bug fix.

Fix parser bug after failed EXEC.

Add "idle" and "drain" events.

Add all known Redis commands from Redis master, even ones that are co…

…ming in 2.2 and beyond.

Send a friendlier "error" event message on stream errors like connection refused / reset.

First tagged version. Hooray.