* milena/sandbox/fred/fun/cos.hh,
	* milena/sandbox/fred/fun/abs.hh:
	  WIP, switching from solve to nsolve.
	* milena/sandbox/fred/fun/assignability.hh: New.
	  Traits to check function properties using sfinae (should be renamed).
	* milena/sandbox/fred/fun/binary.hh: New. Binary function
	* milena/sandbox/fred/fun/compose.hh: New. Compose function.
	* milena/sandbox/fred/fun/composition.hh: New.
	  Composition result objects definition.
	* milena/sandbox/fred/fun/cos.cc: New. Test for composition.
	* milena/sandbox/fred/fun/fun.cc: WIP.
	* milena/sandbox/fred/fun/meta_function.hh:
          Added Meta_Function_v2v and Meta_Function_vv2v categories.
	* milena/sandbox/fred/fun/nsolve.hh,
	* milena/sandbox/fred/fun/nsolve_binary.hh,
	* milena/sandbox/fred/fun/nsolve_unary.hh: New.
	  Original trait solver modification now based
	  on typename flag instead of template <class> class
	* milena/sandbox/fred/fun/thru_morpher.hh: WIP.
	* milena/sandbox/fred/fun/unary.hh: Update & redesign,
	  especially for composition.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3519 4aad255d-cdde-0310-9447-f3009e2ae8c0