Cln bug/nn/fix pytest issues
Solves Issue #6 (closed)
I changed the names of a few methods so that they don't start with 'test'. However, that is actually not a problem for pytest because it only looks into files that start with 'test' (at least with the default configurations).
The errors were coming from some indentation problems in the neural_networks module. When the module was imported, these caused syntax errors that prevented pytest from running properly.