add serialization of record
fix Rakefile
Merge branch 'master' of github.com:espresse/orientdb_binary

Conflicts:
	lib/orientdb_binary.rb
c
Merge branch 'master' of github.com:espresse/orientdb_binary
Merge branch 'master' of github.com:espresse/orientdb_binary
Merge branch 'master' of github.com:espresse/orientdb_binary
Merge branch 'master' of github.com:espresse/orientdb_binary
improve command query