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
Update ChangeLog.txt