* 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
* initial commit of cloudfront_facts.py
* modification as per review from @georgepsarakis
* fixed shippable build error
* fixed shippable build error
* removed wildcard imports and replaced with specific imports from ansible.module_utils.ec2 as advised by @georgepsarakis
* renamed all instances of cloud_front_origin_access_identity to origin_access_identity as advised by @georgepsarakis
* added input option requirements where missing. fixed a typo in an error message, added '.' to the end of sentences.
* fixed typo in documentation
* simplified paginated_response method as advised by @georgepsarakis
* set default option to list_defaults when no option specified as advised by @ryansb
* bumped version to 2.3 as advised by @ryansb
* removed double-nesting of ansible_facts as advised by @ryansb
* show facts based on alias and distribution id for easy referencing as advised by @ryansb. have done for both distribution and distribution_config
* made comments clearer
* fixed incorrect logic for default list_distributions, fixed list_distributions_by_web_acl - wasn't passing web_acl_id, fixed list_invalidations keyword args missing DistributionId
* neatened up logic for list_distributions default
* facts now return Etag as well as specific facts. modified paginated_response to handle this. also all requests that use distribution id also list the facts under the corresponding alias now.
* fixed last fact added clobbering all previous facts for an alias or an id
* removed list_ prefix from list keys
* removed unnecessary boto fields. made list_distributions and list_streaming_distributions dictionaries with id/alias as key. fixed list_invalidations.
* fixed incorrectly named list_distributions_by_web_acl to ..web_acl_id. added id/alias dict for list_distributions_by_web_acl_id
* minor doc changes
* removed merge tag
* fixed more of merge
