Preliminary backend support for tactical destroyer modes.

* Modifies fits table to add "mode" column, which contains typeID of mode for fit
* Introduces Mode type, similar to Ship and Module type
* Includes effects for Amarr Tactical Destroyer Propulsion Mode

Still a lot to do: GUI switching, constraints on which ships get modes, etc

eos/db/migrations/upgrade3.py

@@ -0,0 +1,13 @@
+"""
+Migration 3
+
+- Adds mode column for fits (t3 dessy)
+"""
+
+import sqlalchemy
+
+def upgrade(saveddata_engine):
+    try:
+        saveddata_engine.execute("SELECT mode FROM fits LIMIT 1")
+    except sqlalchemy.exc.DatabaseError:
+        saveddata_engine.execute("ALTER TABLE fits ADD COLUMN mode INTEGER")

eos/db/saveddata/fit.py

@@ -40,7 +40,9 @@ fits_table = Table("fits", saveddata_meta,
                          Column("characterID", ForeignKey("characters.ID"), nullable = True),
                          Column("damagePatternID", ForeignKey("damagePatterns.ID"), nullable=True),
                          Column("booster", Boolean, nullable = False, index = True, default = 0),
-                         Column("targetResistsID", ForeignKey("targetResists.ID"), nullable=True))
+                         Column("targetResistsID", ForeignKey("targetResists.ID"), nullable=True),
+                         Column("mode", Integer, nullable=True),
+)
 
 projectedFits_table = Table("projectedFits", saveddata_meta,
                             Column("sourceID", ForeignKey("fits.ID"), primary_key = True),