Add initial RDS types, there are a lot of these... :cold_sweat:
Initial generic signing with v4
Correct VpcSecurityGroup to VpcSecurityGroupMembership
Implement more types (just for DBInstance) and fix xml mappings
Order types alphabetically
Implement PendingModifiedValues type
Add more RDS types
Option configuration type
Add OptionSetting and Parameter types
Implement final RDS types :boom:
Update RDS types with descriptions and shorten all the doc urls
Switch RDS to V2 Signature, will upgrade this separately
Fix import
Pull out API version into a const
Pass region to create a new RDS service - we can get the service info from this
Fix XML marshaling for various nested types