Big refactor v0.30

All test pass, except for the TestConfig suite, which is not too critical as the
plan for this version onwards is to avoid configuration as much as possible.

tests/test_exporters.py

@@ -6,6 +6,7 @@ import sqlite3
 
 from unittest import TestCase
 from soil import exporters
+from soil import environment
 from soil import simulation
 from soil import agents
 
@@ -38,15 +39,14 @@ class Exporters(TestCase):
     def test_basic(self):
         # We need to add at least one agent to make sure the scheduler
         # ticks every step
+        class SimpleEnv(environment.Environment):
+            def init(self):
+                self.add_agent(agent_class=agents.BaseAgent)
+        
+
         num_trials = 5
         max_time = 2
-        config = {
-            "name": "exporter_sim",
-            "model_params": {"agents": [{"agent_class": agents.BaseAgent}]},
-            "max_time": max_time,
-            "num_trials": num_trials,
-        }
-        s = simulation.from_config(config)
+        s = simulation.Simulation(num_trials=num_trials, max_time=max_time, name="exporter_sim", dry_run=True, model=SimpleEnv)
 
         for env in s.run_simulation(exporters=[Dummy], dry_run=True):
             assert len(env.agents) == 1
@@ -64,12 +64,14 @@ class Exporters(TestCase):
         n_trials = 5
         config = {
             "name": "exporter_sim",
-            "network_params": {"generator": "complete_graph", "n": 4},
-            "agent_class": "CounterModel",
+            "model_params": {
+                "network_generator": "complete_graph",
+                "network_params": {"n": 4},
+                "agent_class": "CounterModel",
+            },
             "max_time": 2,
             "num_trials": n_trials,
             "dry_run": False,
-            "environment_params": {},
         }
         output = io.StringIO()
         s = simulation.from_config(config)