mark research dirty when un-researching, add onUnresearched

src/main/java/ru/dbotthepony/mc/otm/android/AndroidResearch.java

@@ -27,7 +27,12 @@ public abstract class AndroidResearch implements INBTSerializable<CompoundTag> {
 	}
 
 	public void unResearch() {
+		if (!researched)
+			return;
+
 		researched = false;
+		onUnresearched();
+		markDirty();
 	}
 
 	public AndroidResearch(AndroidResearchType<?> type, AndroidCapabilityPlayer capability) {
@@ -51,6 +56,8 @@ public abstract class AndroidResearch implements INBTSerializable<CompoundTag> {
 	 * Should *only* refund research cost to host, not reverse its effects
 	 */
 	abstract public void refund();
+	abstract public void onUnresearched();
+
 	abstract public void onResearched();
 	abstract public void consumeCost();
 	abstract public boolean canAfford();

src/main/java/ru/dbotthepony/mc/otm/android/AndroidResearchBuilder.java

@@ -300,6 +300,11 @@ public class AndroidResearchBuilder {
 					}
 				}
 
+				@Override
+				public void onUnresearched() {
+
+				}
+
 				@Override
 				public boolean canAfford() {
 					if (capability.ply.experienceLevel < experience)