FS#1512 Replace type traits by their standard versions

In flyspray/FS#1512 (closed), @carsten.graeser proposed to replace our own implementations of type traits with the ones provided by the standard library.

In order to make auditing my changes easier, I split them up into several smaller commits that only replace one type trait with it's implementation from std::.

I marked the rather uncommonly named type traits IsBaseOf, IsConst and IsVolatile as deprecated with a warning message to use std::is_base_of, std::is_const and std::is_volatile, instead. The already deprecated class TypeTraits has been removed, as it wasn't used by any of the core modules anymore.

All the standard type traits remain in dune/common/typetraits.hh as using declarations to their std:: implementations. I don't know if it is possible to deprecate using declarations, but I guess we should deprecate them in favor of using the std:: type traits directly. I will soon open merge request for the other core modules and pdelab to replace the type traits used there.

dune/common/parallel/communicator.hh

@@ -464,7 +464,7 @@ namespace Dune
* @param interface The interface that defines what indices are to be communicated.
*/
template<class Data, class Interface>
-    typename enable_if<is_same<SizeOne,typename CommPolicy<Data>::IndexedTypeFlag>::value, void>::type
+    typename std::enable_if<std::is_same<SizeOne,typename CommPolicy<Data>::IndexedTypeFlag>::value, void>::type
build(const Interface& interface);
/**
@@ -1138,7 +1138,7 @@ namespace Dune
}
template<class Data, class Interface>
-  typename enable_if<is_same<SizeOne, typename CommPolicy<Data>::IndexedTypeFlag>::value, void>::type
+  typename std::enable_if<std::is_same<SizeOne, typename CommPolicy<Data>::IndexedTypeFlag>::value, void>::type
BufferedCommunicator::build(const Interface& interface)
{
interfaces_=interface.interfaces();