Achievement popup now displays an icon associated to the achievement

Achievement list now can list all achievements, even those not done yet (not all are fully readable however)
Achievement list can now show progress for certain achievements (like Pyromancer, Cryomancer, Reaver, ...)


git-svn-id: http://svn.net-core.org/repos/t-engine4@3255 51575b47-30f0-44d4-a5cc-537603b46e54