deprecate planned Option monad

...since C++17 will likely ship an option type with the standard library

src/lib/maybe.hpp

@@ -39,6 +39,7 @@
  ** - an alternative or fallback value may be attached.
  ** 
  ** @todo WIP and rather brainstorming as of 2/10
+ ** @deprecated as of 2016 : the upcoming C++17 will provide an optional type!!
  ** 
  ** @see backend::ThreadJob usage example
  */

tests/library/maybe-value-test.cpp

@@ -79,6 +79,8 @@ namespace test{
    * @test Investigate various situations of using a Maybe value or option monad.
    * @note this is a testbed for experiments for the time being 11/2011
    * 
+   * @deprecated as of 2016 : the upcoming C++17 will provide an optional type!!!!!
+   * 
    * @see lib::Maybe 
    * @see null-value-test.cpp
    * @see util::AccessCasted