Tie our AUFS checkout to an explicit commit to fix repeatability better

This commit comes from where AUFS was at the previous build of the
boot2docker ISO, which is known to be working (where latest HEAD from
the upstream aufs3.16 branch doesn't currently compile properly).
Merge pull request #658 from tianon/aufs-determinism

Tie our AUFS checkout to an explicit commit to fix repeatability better
Add ntpd and crond that restarts it, which combats the boot2docker suspend issue
Merge pull request #661 from tianon/ntpd

Add ntpd and crond that restarts it, which combats the boot2docker suspend issue
Fix new NTP code to not delay startup for 10 seconds if we can't ping
Merge pull request #662 from tianon/fix-ntp-startup

Fix new NTP code to not delay startup for 10 seconds if we can't ping
Bump to 1.3.3
Bump to v1.4.0
Merge branch 'master' of https://github.com/boot2docker/boot2docker