Get search working and clean up disconnected client (#23)

* Use ipc instead of pipe

* Run callback passed to child process's send method

* It also returns true

* Correct send signature

* Kill processes when client disconnects

packages/web/yarn.lock

@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+