Get rid of idea of "better" replacements

It turned out to be maintenance hell and it's just hard to find all the dual-action attributes (like crash vs GD sig attr, AB cycle time modification vs rep cycle time modification etc)

eos/db/gamedata/item.py

@@ -41,8 +41,7 @@ items_table = Table("invtypes", gamedata_meta,
                     Column("iconID", Integer),
                     Column("graphicID", Integer),
                     Column("groupID", Integer, ForeignKey("invgroups.groupID"), index=True),
-                    Column("replaceSame", String),
-                    Column("replaceBetter", String))
+                    Column("replacements", String))
 
 from .metaGroup import metatypes_table  # noqa
 from .traits import traits_table  # noqa

eos/saveddata/module.py

@@ -984,7 +984,8 @@ class Module(HandledItem, HandledCharge, ItemAttrShortcut, ChargeAttrShortcut):
         charge = self.charge
         Module.__init__(self, item, self.baseItem, self.mutaplasmid)
         self.state = state
-        self.charge = charge
+        if self.isValidCharge(charge):
+            self.charge = charge
         for x in self.mutators.values():
             Mutator(self, x.attribute, x.value)