Using sstring can lead to confusion with UTF8 strings.
The Java byte type is signed, so make bytes' internal type be signed as
well (even though Cassandra tries to treat it as unsigned).
While we should use int8_t, sstring is not perfectly compatible with this
yet, so add a FIXME and use char instead.
Simplistic database using std::map<> to hold rows, and boost::any to
hold values.
Supports:
- multiple key spaces
- multiple column families
- a few data types
Does not support:
- container data types
- secondary indexes
- composites
- validators
