TODO

   1 - Protocol changes as discussed in the Redis group
   2 - keys expire
   3 - sunion ssub
   4 - write integers in a special way on disk (and on memory?)
   5 - compact types for disk storing of short strings (no 4 bytes overhead!)
   6 - network layer stresser in test in demo
   7 - maxclients directive
   8 - check 'server.dirty' everywere
   9 - replication automated tests
  10 - a command, or an external tool, to perform the MD5SUM of the whole dataset, so that if the dataset between two servers is identical, so will be the MD5SUM
  11
  12 * Include Lua and Perl bindings