Include source for deprecated AWS SDK 1.7 classes removed from AWS SDK 1.9

This addresses the following issue:

  https://github.com/mboudreau/Alternator/issues/90

The previously deprecated classes from AWS SDK 1.7 have since bee removed from AWS SDK 1.9

The original source files for these classes was downloaded from the 1.7.13 release of the AWS SDK:

  https://github.com/aws/aws-sdk-java/releases/tag/1.7.13

The Alternator pom.xml dependency versionswere adjusted to match latest AWS SDK versions.
This required editing some JsonUnmarshaller classes to change .currentToken to .getCurrentToken()

All JUnit tests pass 'mvn verify'.

Alternator version updated to 0.10.0-SNAPSHOT since a different AWS SDK version is used.