fix typescript types everywhere, delete pool.js and refactor relay.js to use event listeners everywhere.

index.ts

@@ -0,0 +1,25 @@
+import {generatePrivateKey, getPublicKey} from './keys'
+import {relayInit} from './relay'
+import {
+  getBlankEvent,
+  signEvent,
+  validateEvent,
+  verifySignature,
+  serializeEvent,
+  getEventHash
+} from './event'
+import {matchFilter, matchFilters} from './filter'
+
+export {
+  generatePrivateKey,
+  relayInit,
+  signEvent,
+  validateEvent,
+  verifySignature,
+  serializeEvent,
+  getEventHash,
+  getPublicKey,
+  getBlankEvent,
+  matchFilter,
+  matchFilters
+}