Added specialized typemap for FANN::helper_array<connection>*.
Added specialized typemap for FANN::helper_array<connection>*.

The general typemap for FANN::helper_array<T>* assumes that it deals
with 1-D lists of doubles only. The functions
neural_net::get_connection_array and neural_net::set_weights_array,
however, are dealing with arrays of FANN::connection structs.

Thus, a separate typemap had to be written, that properly unpacks
Python tuples and converts them into FANN::connection structs.

And the other way round, a typemap converting FANN::connection arrays
into lists of Python tuples had to be added as well.

FutureLinkCorporation/fann2,FutureLinkCorporation/fann2,FutureLinkCorporation/fann2