Code review bab

I reviewed everything in fcp/ except for sitemgr.py,
        xmlobject.py and xmlrpc.py  [01:14]
<Arne`> that means most of pyFreenet is reviewed now (most of the scripts are
        just 3-line wrappers around stuff in fcp/)

I did not add tests for everything, though.

So at the moment I‘m pretty sure that everything in fcp/ except for sitemgr.py, xmlobject.py and xmlrpc.py is not evil. For those I assume good will, but naturally that is not enough to warrant full trust.