[LAU] gx_head some new amp models

For those how like the latest development from the guitarix project, I will let you know that there are some new amp/tube models available in our SVN repository. Lately suggested by guitarix friend merlinthegreen we have reworked the drive function so that a value from zero now realy is zero (bypassed) to reach clean sounds, all tubes can use now a cubic non-linear distortion or a simple non-linear drive for the drive knob. A new tube model (6DJ8) is added. One more, Pete Shorthose have join the development team and have add animation support to libgxw and committed animated Knobs and new switch images for the head. Those how wone have a first impress of what is going on, check out our SVN repository. To build the head from SVN you need to add the configure flag --build_head to ./waf configure. have fun hermann