wesnoth: add version 1.6.5

wesnoth: add version 1.6.5

First thanks to:
*hrw for telling me how to solve a complicated libpng3 RDEPENDS problem:
 libpng is,as pb_ explained,is renamed to libpng3 in a way that we can't
 predict...so the solution was to add libpng3 to RDEPENDS and bitbake
 would have renamed it automatically,and it did. thanks a lot!
*Ivanovic in #wesnoth-dev for telling me that removing the cmake script
 that finds boost make it uses the one shipped with cmake and so
 it finds more recent versions of boost

Tested on:
 *shr/merge with om-gta02 machine
 *boost 1.41.0(boost 1.40.0 didn't configure for me because of a bug that
  made it require MPI)
 *640x480 resolution(the campaign don't work in 480x640 because the dialog
  of the character that appear at the bottom of the screen trigger assertions
  that makes the program abort)
  The solution for it would be to re-use the wml and maybe also the
  source code of the port wesnoth to the iphone available here:
  http://wesnoth.repositoryhosting.com/trac/wesnoth_wesnoth/
  the wml files in question are located here:
  /usr/share/wesnoth/data/themes/default.cfg
  they contain the screen layout definitions.

This recipe compiles wesnoth with tiny GUI,that is better because we can go
 in lower resolutions,but the in the game,the forests appear as grass
 (that's because of the side effects of resizing a picture)