c++ API: use css alias in generated headers, adds global css decl

This changes all generated API headers (.hpp and .hdl) to use a
namespace alias 'css' instead of the pointlessly long com::sun::star

Makes the change in cppumaker & associated tools, adds a global
namespace alias definition in sal/types.h, and removes a kiloton
of local, now pointless-to-harmful versions of that alias from all
over the code.

Change-Id: Ice5a644a6b971a981f01dc0589d48f5add31cc0f

scripting/source/protocolhandler/scripthandler.cxx

@@ -489,9 +489,6 @@ const Reference< XMultiServiceFactory >& xServiceManager )
 
 extern "C"
 {
-
-    namespace css = ::com::sun::star;
-
     SAL_DLLPUBLIC_EXPORT void* SAL_CALL protocolhandler_component_getFactory( const sal_Char * pImplementationName ,
                                          void * pServiceManager ,
                                          void * pRegistryKey )