Move Container and runtime to plugin pkg

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

container.go

@@ -1,67 +0,0 @@
-package containerd
-
-import "golang.org/x/net/context"
-
-type ContainerInfo struct {
-	ID      string
-	Runtime string
-}
-
-type Container interface {
-	// Information of the container
-	Info() ContainerInfo
-	// Start the container's user defined process
-	Start(context.Context) error
-	// State returns the container's state
-	State(context.Context) (State, error)
-	// Pause pauses the container process
-	Pause(context.Context) error
-	// Resume unpauses the container process
-	Resume(context.Context) error
-	// Kill signals a container
-	Kill(context.Context, uint32, bool) error
-	// Exec adds a process into the container
-	Exec(context.Context, ExecOpts) (Process, error)
-	// Pty resizes the processes pty/console
-	Pty(context.Context, uint32, ConsoleSize) error
-	// CloseStdin closes the processes stdin
-	CloseStdin(context.Context, uint32) error
-}
-
-type LinuxContainer interface {
-	Container
-}
-
-type ExecOpts struct {
-	Spec []byte
-	IO   IO
-}
-
-type Process interface {
-	// State returns the process state
-	State(context.Context) (State, error)
-	// Kill signals a container
-	Kill(context.Context, uint32, bool) error
-}
-
-type ConsoleSize struct {
-	Width  uint32
-	Height uint32
-}
-
-type Status int
-
-const (
-	CreatedStatus Status = iota + 1
-	RunningStatus
-	StoppedStatus
-	DeletedStatus
-	PausedStatus
-)
-
-type State interface {
-	// Status is the current status of the container
-	Status() Status
-	// Pid is the main process id for the container
-	Pid() uint32
-}