Pub/Sub API change: now messages received via pattern matching have a different message type and an additional field representing the original pattern the message matched

Virtual memory design document removed, no longer needed as we have a full specification and implementation

Now in redis.conf it is possible to specify units where appropriate instead of amounts of bytes, like 2Gi or 4M and so forth

This reverts commit 566c3c7a.

This reverts commit 122c0498.

This reverts commit 18871421.

Fix for MULTI/EXEC and Replication/AOF: now the block is correctly sent as MULTI/..writing operations../EXEC. Ok for slaves but more work needed for the AOF as it should be a write-all-or-nothing business

Added package require Tcl 8.5 in redis.tcl so it will show a clear error when the test suit is attempted to run under 8.4

Added support for Guru Mediation, and raising a guru mediation if refCount <= 0 but decrRefCount is called against such an object