* Update validate-modules
* Validates ANSIBLE_METADATA
* Ensures imports happen after documentation vars
* Some pep8 cleanup
* Clean up some left over unneeded code
* Update modules for new module guidelines and validate-modules checks
* Update imports for ec2_vpc_route_table and ec2_vpc_nat_gateway
* Added 2 modules for Packet Host: packet_device and packet_sshkey
* Fixed comments from @mmlb
* Fixed comments from @gundalow
* Fix typos pointed by @gundalow
* Mention new Packet modules in the CHANGELOG.md