Add Azure Media Services powershell help files.

Add powershell cmdlet help xml. Fix in code annotations.
Add parameters to examples.
Merge pull request #1900 from christav/dev

Updated to latest SM.NET dlls
Merge pull request #1899 from ivan-shaporov/dev

Add xml help documentation and samples for Media Services cmdlets.
update service management libraries and add SQL mgmt library. only adding reference to the SQL mgmt library to Common.Utilities.
Merge pull request #1911 from guangyang/dev

Adding media and SQL mgmt. libraries to the project
Updated for deploymentslot error
Merge pull request #1914 from christav/dev

Updated for deploymentslot error
Updated client DLLs
Merge pull request #1915 from christav/dev

Updated client DLLs
Merge branch 'dev' into new-subscriptions