Use plain table search history

This is easier, clearer, faster for inters, and ultimately not really much less space efficient than trying to store this in a serialized nor unreasonably slow for retrievals.

Food for thought: Would this might be well-suited to a nosql database?

Lambdas/Lists/SearchHistory/src/SearchHistoryPOST.java

@@ -0,0 +1,11 @@
+import com.amazonaws.services.lambda.runtime.Context;
+import com.amazonaws.services.lambda.runtime.RequestHandler;
+
+import java.util.Map;
+
+public class SearchHistoryPOST implements RequestHandler<Map<String,Object>, Object> {
+
+    public Object handleRequest(Map<String, Object> inputMap, Context unfilled) {
+        return BasicHandler.handleRequest(inputMap, unfilled, SearchHistoryUpdater.class);
+    }
+}