Rework node struct, code now builds
Connector test passes
neural_network_test.go now passes
trainer test now compiles .. in last commit I said the tests were passing, was probably not true.  they just compiled.
connect_test now passes, for reals
Go format everything
Go format
add ability to copy node, nn.Copy test now passes
add a few more assertions to copy test
unique node map working
Remove commented code