Merge branch 'release/0.2.8' into develop
Need json gem
use Yajl for default Json
add msgpack and refactor serializers
make serializer simple
use Ccp::Serializers[key] = mod for custom serializers
update for must-0.2.9
add Ccp::Kvs::Hash
add Ccp::Kvs::Tch
Merge branch 'feature/kvs' into develop
0.2.9
Merge branch 'release/0.2.9'