Update to AWS SDK 1.7.13

Closes #97.

(cherry picked from commit 4380b84)

Author: dadoonet

pom.xml

@@ -90,7 +90,7 @@
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-java-sdk</artifactId>
-            <version>1.7.3</version>
+            <version>1.7.13</version>
             <scope>compile</scope>
             <exclusions>
                 <!-- jackson is optional -->