* Allow protection of certain keys during camel_to_snake
Create an `ignore_list` parameter that preserves the case
of the contents of certain dictionaries. Most valuable
for `tags` but other uses might arise.
* Port ec2_vpc_route_table to boto3
Update tests to reflect fixes in boto3.
* Add RETURN documentation to ec2_vpc_route_table
* Update DOCUMENTATION to be valid yaml
* Add check mode tests
Allow CamelCase version of snake_dict_to_camel_dict
(currently only dromedaryCase is supported)
Add reversible option to camel_dict_to_snake_dict
Add tests for both of these options
* Make camel_to_snake work on capitalized plurals
`TargetGroupARNs` should become `target_group_arns`, not
`target_group_ar_ns`
Promote `camel_to_snake` to top layer function but prefix
it with an underscore.
Add tests for improved `_camel_to_snake` function.
Reduce use of `re.compile` as it makes no sense when the
compilation result is not reused.
* Remove unused LooseVersion check
* Fix PLURALs case for camel_to_snake
Also renamed EXPECTED_CAMELIZATION to EXPECTED_SNAKIFICATION
