update for 0.4.3
Merge branch 'dev' of https://github.com/guangyang/azure-sdk-for-java into dev
Merge branch 'release' of https://github.com/WindowsAzure/azure-sdk-for-java into release
update pom.xml to 0.4.3
update changelog for 0.4.2 and 0.4.3
update based on code review feedback
Merge pull request #345 from guangyang/release

Update readme, changelog and pom.xml for 0.4.3