interfaces: merged exceptions.idl into *_interfaces.idl, assigned tags for all...

interfaces: merged exceptions.idl into *_interfaces.idl, assigned tags for all modules, types, and operations

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@708 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534