Updated all the RTShader materials to the one to be used with Ogre 1.9.
Fixed the RTShader system initialization.

Based on the comment here:
http://www.ogre3d.org/forums/viewtopic.php?p=487445#p487445

This is fixing the fact that the rtshader_system token in materials wasn't recognized.
A few models are already behaving differently concerning the ambient light.

More testing is needed but I'm rather sure normal handling is more or less fixed.
Fixed the remaining warning seen on materials.

The GLSL scripts are still triggering error on runtime, as oln already reported
here: http://www.ogre3d.org/forums/viewtopic.php?f=2&t=66009

But this will have to be dealt with either in another commit, or fixed by Ogre itself.
Mode the claimed tiles and walls arrows less shiny.