Added new extension methods for IAsset and IAssetFile to parse the Media Services Encoder Metadata out of the metadata asset file

Added new IAssetFileExtensions class and moved there all the IAssetFile extensions
Added new unit tests
Update README.md
Bug fixing
# added extensions methods for IAsset and ILocator interfaces to get the HLS version 3 Streaming URL
Update README.md
Update README.md
# added ConfigureAwait(false) to all 'async/await' operations to avoid potential deadlocks
Merge pull request #9 from mconverti/dev

Bug fixing + new extensions to parse Media Services Encoder metadata and generate HLS v3 URL