BlocHam not model independent

[GoogleCodeExporter]

The line 
{{{
               H=first.n[0];
}}}
in BlocHam.cpp needs to be manually adjusted to adapt to the problem defined in 
the gen_model.m script.

This should be fixed so that user do not need to edit the c++ file at all.  

Original issue reported on code.google.com by 9cheng....@gmail.com on 13 Oct 2012 at 5:13