Only calculate the MD5 from a file if it wasn't provided in the metadata
Add MessageAttributes 

add missing MessageAttributes to the newly created SendMessageBatchRequestEntry
Addresses issue #228.
add MessageAttributes to SendMessageResult
AWS SDK for Java 1.7.13

This release adds support for Amazon S3 Server-Side Encryption with Customer Keys, Amazon SNS Message Attributes, the latest Amazon RedShift API update, and also includes enhancements for canceling SDK requests.
Merge branch 'master' of https://github.com/aws/aws-sdk-java into s3-putObject-md5-file

Conflicts:
	src/main/java/com/amazonaws/services/s3/AmazonS3Client.java
AWS SDK for Java 1.8.0

This release adds support for configuring Amazon Elastic Transcoder to transcode closed captions and configuring IAM roles for Amazon Elastic MapReduce. This release of the SDK requires Java 1.6 or later.
empty strings are not valid credentials
Set the source encoding to UTF-8 to remove a maven warning when building
Merge pull request #225 from ankon/s3-putObject-md5-file

Only calculate the MD5 from a file if it wasn't provided in the metadata
Merge pull request #229 from fotofinder/master

Add MessageAttributes to Messages
Merge pull request #236 from ankon/build-utf8

Set the source encoding to UTF-8 to remove a maven warning when building
AWS SDK for Java 1.8.0

This release adds support for Amazon Simple Email Service delivery notification and aborting, pausing, and resuming transfers using the TransferManager.
AWS SDK for Java 1.8.1

This release adds support for Amazon Simple Email Service delivery notification and aborting, pausing, and resuming transfers using the TransferManager.
Update GitHub version number to 1.8.2-SNAPSHOT
Merge pull request #235 from tptodorov/master

empty strings are not valid credentials