Merge pull request #1 from WindowsAzure/dev

Merging dev into master
# merged all the Extensions available at https://github.com/mconverti/azure-sdk-for-media-services-extensions/tree/dev
# fixed SA errors
Merge branch 'master' into dev
# added new overloads for the AssetBaseCollection.CreateFromFolder and AssetBaseCollection.CreateFromFile using the default Storage Account selection strategy
Merge pull request #2 from mconverti/dev

Merging existing Extensions into new repository