[cdt-dev] non breaking API change for c++-template support

["Schorn, Markus" <Markus.Schorn@xxxxxxxxxxxxx>]

To correctly implement template instantiations I will need to enhance
API. You can join a discussion here:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=250788 (values)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=242668 (template
arguments)
 
Here is an excerpt of the added API:

IValue: 
   to model initial values of variables/enumerators
ICPPTemplateArgument: 
   to model template args, which can be types or values
ICPPTemplateParameterMap: 
   to be able to deprecate the ObjectMap returned in the API of
specializations


Markus.