[moveclone] Demonstrate that unique_ptr<>() can be returned
[listinitializers] Show use of initializer_list<>
[variadic] Sample variadic template outputters
[variadic] Commented out broken code
[variadic] Demonstrate how to use a do-nothing function to wrap an exapansion
[variadic] Make the output-in-one variadic function work

Remove the need for recursion.
[variadic] Update the tests to output to a stringstream so that we can test output
[variadic] Add test of variadic argument count
[delegates] Demonstrate using templates to generate delegate functions for C
[pointers] Demonstrate/test unique_ptr<> and shared_ptr<>
[classtester] Module to test presumptive properties of types
[construction] Demonstrate that destructors aren't called on constructor exceptions
[construction] Remove unused #includes
[futures] Demonstrate various uses of future
[stl_exceptions] Test system_error
[stl_exceptions] Example of custom error category
[classtester] Fix copy-and-pasteos in incomplete BooleanTest
[delegate] Comment out non-working bare_instant_callback() template

The principle is sound, but C++ doesn't like the non-constexpr void*
parameter to a template.