Merge pull request #186 from robszumski/add-highlighting

feat(docs): add syntax highlighting
networkd: Reverse lexicographic order of generated unit files
Merge pull request #187 from crawford/order

networkd: Reverse lexicographic order of generated unit files
system: Cleanup redundant code
system: Add more logging for networkd
Merge pull request #190 from crawford/logs

Logs
coreos-cloudinit: bump to 0.9.0
coreos-cloudinit: bump to 0.9.0+git
fix(docs): clarity around boot behavior and unit usage
Merge pull request #181 from robszumski/docs-startup

fix(docs): clarity around boot behavior and unit usage
config: Verify that type assertions are valid
Merge pull request #191 from crawford/panic

config: Verify that type assertions are valid
docs(quick-start): Clarified use of fields in cloud config

Updated the language to illustrate that fields in a cloud config is not
supported in all environments. This is expressed explicitly in PXE and
install to disk pages. The quick start lacked this information and is
inconsistent.
docs(quick-start) Enumerated supported platforms

Following suggestion a list of platforms that *do* support cloud config variables. In addition minor mark up formatting is added.
Merge pull request #193 from benjic/cloudconfig_variables

docs(quick-start): Clarified use of fields in cloud config
doc: escape user.home example
configdrive: Use the EC2 metadata over OpenStack

Standardize on specific EC2 and OpenStack versions and add tests.