Refactoring v0.15.1

See CHANGELOG.md for a full list of changes

* Removed nxsim
* Refactored `agents.NetworkAgent` and `agents.BaseAgent`
* Refactored exporters
* Added stats to history

tests/test_stats.py

@@ -0,0 +1,34 @@
+from unittest import TestCase
+
+from soil import simulation, stats
+from soil.utils import unflatten_dict
+
+class Stats(TestCase):
+
+    def test_distribution(self):
+        '''The distribution exporter should write the number of agents in each state'''
+        config = {
+            'name': 'exporter_sim',
+            'network_params': {
+                'generator': 'complete_graph',
+                'n': 4
+            },
+            'agent_type': 'CounterModel',
+            'max_time': 2,
+            'num_trials': 5,
+            'environment_params': {}
+        }
+        s = simulation.from_config(config)
+        for env in s.run_simulation(stats=[stats.distribution]):
+            pass
+            # stats_res = unflatten_dict(dict(env._history['stats', -1, None]))
+        allstats = s.get_stats()
+        for stat in allstats:
+            assert 'count' in stat
+            assert 'mean' in stat
+            if 'trial_id' in stat:
+                assert stat['mean']['neighbors'] == 3
+                assert stat['count']['total']['4'] == 4
+            else:
+                assert stat['count']['count']['neighbors']['3'] == 20
+                assert stat['mean']['min']['neighbors'] == stat['mean']['max']['neighbors']