#1092 fixed (PartialMedium changed in a non-backwards compatible way):
- package Choices re-introduced in PartialMedium as a short class
  definition to Modelica.Media.Interfaces.Choices.
- all type definitions re-introduced in PartialMedium with short class
  definitions to Modelica.Media.Interfaces.Types.XXX
In all cases an "obsolete annotation" added to the definition.
New models should use the Modelica.Media.Interfaces.Choices/Types
definitions. Existing models will, however, still work.

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@6336 7ce873d0-865f-4ce7-a662-4bb36ea78beb