Return an empty array of partitions on a non-zero rc from parted.

In the event the disk label/partition table is missing, parted exits with the fixnum 1 from Linux Admin.
flush out fstab.write
flush out partition.format_to
flush out lvm support
store partition type, start sector, end sector
implement disk#create_partition
Dynamically create authors lists in the gemspec to give everyone credit
Moving inside the block to live with the rest of the qit commands.
Move text parsing from available_subscriptions to private parse_output
Split content parsing into its own method
Extract formatting of values into a method
Prevent blank lines from causing nil errors
Add test for #organizations
Add #organizations
implement disk.size and disk.clear
flush out lvm write support
Add Kernel.spawn's chdir option to .run.
Remove deprecation warnings.
Stub Disk#size to prevent shelling out on PhysicalVolume.create

Resolves "No such file or directory - /sbin/fdisk -l" failures on a Mac.
Fail on unintended Kernel.spawn.