Implement minimal bucket listing
Make page structures opaque to requestbuilder
Clean up extra stuff
Fix bad parsers for shell-ish HMAC key sources
Implement minimal object fetching
Implement minimal object deleting
Clean up region/url options
Implement minimal create/delete bucket
Reimplement check-bucket
Port CreateAccount
Port CreateAccountAlias
Port CreateGroup
Port CreateLoginProfile
Port CreateSigningCertificate
Port DeactivateMFADevice
Port DeleteAccessKey
Port DeleteAccount
Port DeleteAccountAlias
Port DeleteGroupPolicy
Update DeleteLoginProfile help strings