V0.2.0a: Made Artifacts sellable, buffed ring sale price (as they are stronger now)

src/com/shatteredpixel/shatteredpixeldungeon/items/artifacts/Artifact.java

@@ -188,6 +188,17 @@ public class Artifact extends KindofMisc {
         partialCharge = bundle.getFloat( PARTIALCHARGE );
     }
 
-
-
+    @Override
+    public int price() {
+        int price = 200;
+        if (level > 0)
+            price += 30*level;
+        if (cursed && cursedKnown) {
+            price /= 2;
+        }
+        if (price < 1) {
+            price = 1;
+        }
+        return price;
+    }
 }

src/com/shatteredpixel/shatteredpixeldungeon/items/rings/Ring.java

@@ -263,7 +263,7 @@ public class Ring extends KindofMisc {
 	
 	@Override
 	public int price() {
-		int price = 80;
+		int price = 120;
 		if (cursed && cursedKnown) {
 			price /= 2;
 		}