Merge pull request #2163 from AzureRT/dev

Dev
update readme and changelog
Merge pull request #2164 from guangyang/release

update readme and changelog
Update ChangeLog.txt
Fixing spec issue in creating media service accounts
New code to conform to the server changes
Added fixes to media services tests (thanks @gtrifonov)
Merge pull request #2168 from christav/media-services-fix

Media services fix
update release date
Merge pull request #2169 from guangyang/release

update release date
Merge pull request #2172 from guangyang/master

release 0.7.2
Merge pull request #2174 from WindowsAzure/master

Merge master into dev
Changed Start-AzureHDInsight Job to throw an exception if the query text is specified and contains the '%' character.
Merge pull request #2177 from Phanatic/Add_HdInsight_Assembly

Hotfix for issue #2176
Updating versions
Merge pull request #2181 from markcowl/release-0.7.2.1

Updating versions
Merge pull request #2183 from WindowsAzure/release-0.7.2.1

Release 0.7.2.1
Merge pull request #2184 from WindowsAzure/master

Merge master into dev
Update ChangeLog.txt
Merge branch 'master' of github.com:WindowsAzure/azure-sdk-tools into dev