Use golang.org/x/net/context for now

We'll move to "context" once the grpc, protobuf and protoc-gen-go packages have
done so (see grpc/grpc-go#711)

This also forced me to manually update tonistiigi/fifo to use the old
context path for now.

This change ensures we stay compatible with go1.6.x

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
(cherry picked from commit fa71c58)

Merge pull request containerd#321 from mlaventure/cherry-pick-exec-fi…

…x-for-release

Fixes for Docker 1.12.2

Update version to 0.2.3

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

Bump to version v0.2.2

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

Bump runc to e87436998478d222be209707503c27f6f91be

Fixes for cgroup memory updates and process labeling.

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

Bump to version 0.2.0

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

Update readme and version to 0.1.0

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

Merge pull request containerd#98 from docker/shim

Containerd 0.5

Bump version to 0.0.4

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

Update to 0.0.3

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