Merge pull request #2 from WindowsAzure/dev

Merging changes from dev branch
Adding Ingest manifest files tests
Merge branch 'dev' of https://github.com/gtrifonov/azure-sdk-for-media-services
NotificationEndPoint unit tests.
Cancellation token tests.
Changing AssetFileCreateAsync not to be a blocking call and return task right after parameter validations
Merge branch 'dev' of https://github.com/WindowsAzure/azure-sdk-for-media-services into dev

Conflicts:
	test/net/unit/SDK.Client.Tests.Unit.csproj
Addressing feedback.Removing warnings
Merge pull request #73 from gtrifonov/dev

More unit tests and changing asset file creations task