Corrected the function names that were private by mistake
Merge pull request #133 from alimoeeny/patch-17

Corrected the function names that were private by mistake
ec2: Correctly refresh IAM credentials.

Analogous to the patch to sqs in #111.
Merge pull request #134 from nelhage/ec2-refresh

ec2: Correctly refresh IAM credentials.
dynamodb: scan support for large data sets