launching-containers-fleet: add global units
Fix references to GitHub
Add documentation on the new config for user files and the newly supported storage option
Review fixes
Spelling: fix typo: "varaible"

Signed-off-by: Geoff Hill <geoff@geoffhill.org>
Merge pull request #324 from geoffhill/master

Spelling: fix typo: "varaible"
launching-containers: warn about detached mode
launching-containers-fleet: fix merge conflict
Merge pull request #309 from robszumski/fleet-global-units

launching-containers-fleet: add global units
launching-containers-fleet: remove deprecated X- prefix
Merge pull request #326 from robszumski/depr-x-prefix

launching-containers-fleet: remove deprecated X- prefix
launching-containers: clarify global units + machine metadata
Fixed Sidekick fleetctl launch command to launch all services.
Merge pull request #327 from anonymuse/master

Fixed Sidekick fleetctl launch command to launch all services.
X-Fleet variable requires 'X-' prefix.
  - The older 'ConditionMachineOf' nomenclature requires 'X-'
  - Can also be updated to 'MachineOf' from v.0.8.0, but that
  doesn't match the rest of the documentation.
Moving X-Fleet variable to 'MachineOf'.
escape JSON in DigitalOcean curl example

Fixes invalid JSON error for cloud configs that contain double quotes.
Merge pull request #329 from anonymuse/master

X-Fleet variable cleanup
Merge pull request #325 from coreos/docker-start-daemon

launching-containers: warn about detached mode
launching-containers-fleet: update deprecated X-Fleet parameters