chore(docs): doc cleanup (#76)

* update readme and example docs

README.md

@@ -1,4 +1,5 @@
-# dgraph-js-http [![npm version](https://img.shields.io/npm/v/dgraph-js-http.svg?style=flat)](https://www.npmjs.com/package/dgraph-js-http) [![Build Status](https://img.shields.io/travis/dgraph-io/dgraph-js-http/master.svg?style=flat)](https://travis-ci.org/dgraph-io/dgraph-js-http) [![Coverage Status](https://img.shields.io/coveralls/github/dgraph-io/dgraph-js-http/master.svg?style=flat)](https://coveralls.io/github/dgraph-io/dgraph-js-http?branch=master)
+# dgraph-js-http 
+[![npm version](https://img.shields.io/npm/v/dgraph-js-http.svg?style=flat)](https://www.npmjs.com/package/dgraph-js-http) [![Coverage Status](https://img.shields.io/coveralls/github/dgraph-io/dgraph-js-http/master.svg?style=flat)](https://coveralls.io/github/dgraph-io/dgraph-js-http?branch=master)
 
 A Dgraph client implementation for javascript using HTTP. It supports both
 browser and Node.js environments.

examples/simple/README.md

@@ -33,13 +33,9 @@ Finally, start the `dgraph alpha`:
 
 ```sh
 cd local-dgraph-data/data
-rm -r p w; dgraph alpha --zero localhost:5080 -o 100
+rm -r p w; dgraph alpha --zero localhost:5080
 ```
 
-Notice that in the command above, we shifted the ports by 100 from the default ports of 7080 for
-internal traffic, 8080 for http, and 9080 for GRPC, which means the alpha server is binding to
-the port 7180 for internal traffic, 8180 for http, and 9180 for GRPC.
-
 For more configuration options, and other details, refer to
 [docs.dgraph.io](https://docs.dgraph.io)