refactor test so network creation can be re-used
add ability to get connections from a connector
pseudocode for trainer implementation
begin implementation of nn copy method.  still in progress.
last attempt at cleanup broke some stuff, put it back the way it was
add ability to append an outbound connection to a connector. ditto inbound
fix bug, was using target connection instead of node copy.  passes one more test
refactor createConnectionTargetCopy monstrosity into its own function
create channels in copy now, passes one more test
wire up inbound connections in Copy().  passes one more test.
the other in inbound connections was always *Node, and had lost its real type.  add a test and a fix.
Fix bug copying channel, forgot to add to scaffold.  all tests for Copy() pass now.