New transport increase max length for #9
Fix missing yield in _server_version().
http_status should be http_code.
my ears! please!
Merge pull request #11 from smn/feature/stop-shouting

my ears! please!
+ added kwarg "method" to get() in order to support http method HEAD
+ added a bucket.head() method that can be used as a lightweight test if a key exists
+ added a head() similar to reload, but only the metadata is updated. usefull for keys with large content
+ test case for bucket.head() method
dedicated transport.head() method
Merge pull request #10 from jerith/transport-fixes

Transport fixes
Merge pull request #12 from pfote/master

support for bucket.head() metadata request
+ protobuf code generation, proto files from riak_pb (couldn't get riak_pb to compile, so i cpied them for now)
minimal Riak PBC Protocol and client, quality: proof of concept, no bells and whistles (not even vclock)
+ added some basic tests for RiakPBCClient
+ renamed tests, added get/setClientId
+ some more functionality and tests
implemented delete()
+ bucket operations
Fixing link header bug. #13