Updated README with note about current fork status
Added Index property to VBucket struct

Index property is used to keep track of  the position of a
VBucket in the vbucket map
Fixed some concurrency/race conditions during node failure (WIP?)
NCBC-134: Failover on bootstrap node never recovers
NCBC-168: Don't swallow pooled socket errors
There is no constructor of VBucket that takes two arguments, so adding index as a third parameter to the VBucket initialize statement.
Fix Increment call that takes a CAS parameter
Possible fix for http://support.couchbase.com/requests/2380
Handle scenario where the object that returns from CasMutate has a null StatusCode property
NCBC-166: Allow full fidelity of keys
NCBC-197: Throw meaningful exception when 0 bytes received on socket
NCBC-212: Don't swallow status code in ExecuteRemove
NCBC-229: Add Remove with Cas method
NCBC-228: Frequent pooled socket errors during rebalance

It appears that there are concurrency issues when the server
is sending frequent config updates, as is the case during
a rebalance.  Config updates trigger the client to destroy its
socket pool after first creating a new one.

This change briefly delays the destruction of the old pool
so that any in progress operations may complete.
Fixes expiration date issue
Ref. Issue #96 (https://github.com/enyim/EnyimMemcached/issues/96)

Signed-off-by: Rob Mayer <rmayer@stewartstrategy.com>