Read current Vagrantbox machine id.
Adding initial export of current Vagrantbox.
Updated buildbox creation script: now creating new temporary box, instead of re-using existing one.
Remove temporary buildbox.
Added missing parameter to vboxmanage.
Fixed version number checking.
Update submodules before launching vagrant.
Install Iceweasel from testing (instead of experimental).

Currently causes downgrade from 29.x to 24.x.
Merged lb4 w/ upstream/master.