Switch to pkgng to prepare for FreeBSD 10.0
Add a few variables to properly support the use of a custom kernel conf
Make PKGNG optional
Fix typo
Copy base.txz and kernel.txz if not in CUSTOM mode
Merge pull request #28 from nitroboost/master

Add a few variables to properly support the use of a custom kernel conf
add customisable /boot.config

- assume dual serial + console by default
- use `-Dh` instead to prefer serial console
add customisable /etc/hosts
add generic file copy step
add support for GCE images

- gnu tar format with sparse file support
- the included file must be named disk.raw
Merge pull request #30 from jsonified/gce-support

GCE support
Rename filesdir to customfiles and process only if it exists
add option to disable noatime on entire zfs pool
enable lz4 compression instead of lzjb for zfs pool version gt 28
add option to set up 4k aligned partitions for swap and zfs
make boot block 4k aligned and larger for growth