[COOK-2471] - add slave_compressed_protocol tunable
[COOK-2478] - remove duplicate and incorrect 'read_only' setting and associated attribute
Merge pull request #60 from ninefold/COOK-2478

[COOK-2478] - remove duplicate and incorrect 'read_only' setting and ass...
Merge pull request #58 from ninefold/COOK-2471

[COOK-2471] - add slave_compressed_protocol tunable