Solver testing

Hello everybody:

I did my BiCGstab solver version, I know, this is nothing new for you but I would like you to test it and if you find a bug please let me know. I give you my blog link where you can download it. In the file are some examples with the solvers we already know from the toolkit but the important one is the BiCGstab and there is a guide to use it on linux as well.