Add LogConfig and Ulimits(new in docker 1.6).

[lingdecong]

Implement the new feature in docker 1.6

Ulimits - A list of ulimits to be set in the container, specified as { "Name": , "Soft": , "Hard": }, for example: Ulimits: { "Name": "nofile", "Soft": 1024, "Hard", 2048 }}

LogConfig - Logging configuration to container, format { "Type": "<driver_name>", "Config": {"key1": "val1"}} Available types:json-file,syslog,none.json-file` logging driver.

Add two types for HostConfig

[lingdecong]

ping @vieux @abronan

[donhcd]

LGTM.

I tested by running ContainerCreate with

HostConfig: dockerclient.HostConfig{
                        Ulimits: []dockerclient.Ulimit{
                                {
                                        Name: "nofile",
                                        Soft: 1024,
                                        Hard: 2048,
                                },
                        },
                        LogConfig: dockerclient.LogConfig{
                                Type: "none",
                        },
                },

and the docker inspect for the created container had the expected Ulimits and LogConfig settings - the default seems to be "json-file" logging and no Ulimits.

[donhcd]

ping @aluzzardi @ehazlett

[vieux]

LGTM