fix for issue 188, broker properties mapper
fix for issue 189, unicode issues in BrokeredMessage
fix for issue 191, unicode issues in BlobOperationRestProxy.java
update the unicode issues in HmacSHA256Sign file, issue 192#.
fix base64 string adapter encoding issue, issue #193.
fix issue #194, unicode issue in DefaultEdmValueConverter.java
add the missing DefaultEdmValueConverter.java file
Merge pull request #23 from gcheng/global

Unicode issue for this sprint.
Merge pull request #288 from gcheng/dev

Dev
Merge branch 'release' of https://github.com/WindowsAzure/azure-sdk-for-java into release
throw exception when you create or update null message.
Merge pull request #24 from gcheng/global

throw exception when you create or update null message.
Merge pull request #293 from gcheng/dev

Dev
Merge pull request #296 from WindowsAzure/master

Pull master to dev
fix the global date parsing issue.
fix the javadoc documentation issue.
Merge branch 'dev' of https://github.com/gcheng/azure-sdk-for-java into packagedoc
Merge pull request #27 from WindowsAzure/dev

Dev
Merge branch 'dev' of https://github.com/gcheng/azure-sdk-for-java into packagedoc
Merge pull request #25 from gcheng/global

fix the global date parsing issue.