Created example using socrates data and agent for experimentation

Hi @cosmoharrigan, I put a new agent in the attention directory to be better able to modify it.
I'm loading it from the socrates file and just running some steps to check if it's working properly. It seems to be working; however, I get a lot of atoms like this:
```
(InheritanceLink (av 0 0 1)
    (VariableNode "$pln_var_xxxx")
    (VariableNode "pln_var_yyyy")
)
```
Is there a way to filter them out as they obstruct the rest of the relevant atoms?
Assuming you want to experiment with having attention allocation guide the agent, then you would want to put the agent stepping inside the same loop as the attention allocation stepping.