reviewed code structure, cleaned comments, now pep8 conform

backend/src/parameters/landmarks_manager.params

@@ -0,0 +1,8 @@
+{
+  "city bbox side" : 10,
+  "radius close to" : 27.5,
+  "church coeff" : 0.6,
+  "park coeff" : 1.4,
+  "tag coeff" : 100,
+  "N important" : 30
+}

backend/src/parameters/optimizer.params

@@ -0,0 +1,4 @@
+{
+  "detour factor" : 10,
+  "average walking speed" : 27.5
+}