Added reference to app: URI
Add support for aliasing.
Minor fix for aliases (better error msg for circular references).
Merge remote-tracking branch 'upstream/develop' into app-uri
adding MMS reference
fixing SMS reference to not point to a very old version
adding SysApps Runtime reference
fix MMS reference
Merge pull request #202 from marcoscaceres/app-uri

Added reference to app: URI
addressing comments
Merge pull request #203 from efullea/develop

Adding MMS and SysApps Runtime references and fixing SMS reference
Merge pull request #201 from tobie/add-bibref-aliasing

Add bib ref alias support.