Correct documentation of datasets::run, returns output array
not hash of input to output

Remove pdl::Datasets new after correcting bless in nnflex datasets
to two param form

Redocument to reflect 0.2 refactoring for inheritance and hence
new syntax

Put documentation for the individual network subclasses back into
their PMs.

Implement a 'connect' method to allow recurrent connections, forced node connections can use index [x,x]. Need to decide on a good parameter syntax for that.

investigate whether random weights should be permitted to be negative or positive only for fasted convergence

simple frontend script

read & write methods for both networks and datasets modelled on snns format (for use with frontend script). data should be snns format, network definition file will probably have to differ