Added MediaEncoderTaskPresetString and MediaProcessorNames classes.
Merge pull request #2 from cabralmartin/master

MediaEncoderTaskPresetString and MediaProcessorsNames
# minor updates to file headers
# minor fixes in code comments
# minor renaming
# updated NuGet package
# fixed namespace in MediaProcessorNames class
# added Sample VOD Workflow console application using the Extensions
# updated workflow sample