Bump yungsang/boot2docker to v1.3.0

• Docker v1.3.0

Bump yungsang/boot2docker to v1.2.2

• bump kernel to 3.16.4
• ntpclient with shorter update and correct logging

Support vboxsf

• Docker v1.2.0
• Support vboxsf

Upgrade docker to version 1.2.0

• Docker v1.2.0

Upgrade docker to version 1.1.2

• Docker v1.1.2

https://github.com/YungSang/boot2docker/releases/tag/yungsang%2Fv1.1.2

Upgrade boot2docker to version 1.1.1

• Docker v1.1.1
• Kernel v3.15.3

Upgrade boot2docker to version 1.1.0

• Docker v1.1.0

Refactoring docker-enter (docker-attach)

yungsang/v1.0.3

Revise tests for docker-enter

Add nsenter and docker-attach

• Docker v1.0.1
• Use boot2docker.iso which has nsenter
• Add docker-attach script for nsenter

Upgrade boot2docker to version 1.0.1

• Docker v1.0.1