Add new blocks and new generator code for water

[the-duck2010]

New blocks and I changed the water code to convert it to a generator. This should help it show up in the inventory in the future.

Demo world for the changes: (MUST use custom version!)

DemoWorld;3ulwt;8,1q,a,-1v,1t,o;Alpha 0.7.1;0,2,1z,2k,2l,2m;0,3,0,4a4,7gc,7go,7gp,7gq,7gr,7gs,4h8,7nd,7ne,7nf,7ng,7ns,h55,h56,h57,7nw,1iw,7uh,7ui,7uj,7uk,7uw,e6h,e6i,e6j,7v0,814,4vf,4vg,81k,81l,81m,81n,81o,820,b7t,b7u,b7v,824,52k,88q,88r,88s,894,895,896,897,898

[the-duck2010]

[Willard21]

I fixed the semi-transparent inventory icons, and added the real lava texture myself, so I'll just close this. I'm not adding TNT.