change repo structure; modify readme

examples/func_fit/xor.py

@@ -1,32 +0,0 @@
-from pipeline import Pipeline
-from algorithm.neat import *
-
-from problem.func_fit import XOR3d
-
-if __name__ == '__main__':
-    pipeline = Pipeline(
-        algorithm=NEAT(
-            species=DefaultSpecies(
-                genome=DefaultGenome(
-                    num_inputs=3,
-                    num_outputs=1,
-                    max_nodes=50,
-                    max_conns=100,
-                ),
-                pop_size=10000,
-                species_size=10,
-                compatibility_threshold=3.5,
-            ),
-        ),
-        problem=XOR3d(),
-        generation_limit=10000,
-        fitness_target=-1e-8
-    )
-
-    # initialize state
-    state = pipeline.setup()
-    # print(state)
-    # run until terminate
-    state, best = pipeline.auto_run(state)
-    # show result
-    pipeline.show(state, best)