client-libraries/cpp/TODO

   1 command handlers:
   2 - support DEL as vararg
   3 - support MLLEN and MSCARD
   4
   5 unit tests:
   6 - sort with limit
   7 - sort lexicographically
   8 - sort with pattern and weights
   9
  10 extras:
  11 - benchmarking "test" app
  12 - consistent hashing?
  13
  14 maybe/someday:
  15 - make all string literals constants so they can be easily changed
  16 - add conveniences that store a std::set in its entirety (same for std::list, std::vector)