Fail when boto cannot be patched
Fixed bug introduced in 0d96eb: boto patch wasn't applied
Remove erroneous line from the grub task
Replace "grub" package with "grub-pc"

grub is only dummy transitional package that depends on grup-pc.
debootstrap on wheezy seemed to fail when using only "grub".
Use /etc/sudoers.d/ to configure admin user sudo rights
Add attribution to changelog
Put the registered AMI ID in quotes
Strict check for AMI ID