Use aufs to handle parents whitouts instead of doing it manually
Do not prevent docker from running when kernel detection fails
Make the kernel version detection more generic
Move the kernel detection to arch specific files
Check that the pid in pidfile exists before preventing docker to start
Add unit test for file deletion
Make kernel detection work without suffix
Merge pull request #456 from dotcloud/453-generic_kernel_detection-fix

453 generic kernel detection fix
Merge pull request #442 from dotcloud/fix_deleted_file_diff

Use aufs to handle parents whiteouts instead of doing it manually
Merge pull request #463 from dotcloud/improve_pid_file_feature

Check that the pid in pidfile exists before preventing docker to start