This commit allow to name a flavor track as you want, not only presenter, presentation or other
Added ref/mimetype attributes to mediapackage  attachments
Merge pull request #118 from polimediaupv/upv/fix-flavor-names

This commit allow to name a flavor track as you want
Merge pull request #119 from polimediaupv/upv/fix-attachment-attributes

Added ref/mimetype attributes to mediapackage  attachments