Penalize speed ganglinks against overheat on module itself (fixes #170)

eos/effects/gangabmwdfactorboost.py

@@ -8,4 +8,4 @@ def handler(fit, module, context):
     if "gang" not in context: return
     fit.modules.filteredItemBoost(lambda mod: mod.item.group.name == "Propulsion Module",
                                   "speedFactor", module.getModifiedItemAttr("commandBonus"),
-                                  stackingPenalties = True)
+                                  stackingPenalties=True)

eos/effects/overloadselfspeedbonus.py

@@ -4,4 +4,5 @@
 # Modules from group: Propulsion Module (107 of 107)
 type = "overheat"
 def handler(fit, module, context):
-    module.boostItemAttr("speedFactor", module.getModifiedItemAttr("overloadSpeedFactorBonus"))
+    module.boostItemAttr("speedFactor", module.getModifiedItemAttr("overloadSpeedFactorBonus"),
+                         stackingPenalties=True)