Fixed typos in README.md (#11)

Author: Chunbo

README.md

@@ -13,10 +13,10 @@ npm install
 ### SSL/TLS
 The default plain port is 8095, and the default secure port is 8096. These default values can be modified in the file `config.json`.
 
-Connecting server with secure socket.io connections are recommended. The default certificate is stored in `cert` directory with two files: `cert.pem` and `key.pem`. Please replace them with a trusted one applied from a trusted CA.
+Connecting server with secure socket.io connections is recommended. The default certificate is stored in `cert` directory with two files: `cert.pem` and `key.pem`. Please replace them with  trusted ones applied from a trusted CA.
 
 ### Launch the server
-Run the following commands to launch the server:
+Run the following command to launch the server:
 
 ```
 node peerserver.js
@@ -36,4 +36,4 @@ OWT project is licensed under Apache License, Version 2.0. By contributing to th
 Use the "Issues" tab on Github.
 
 ## See Also
-http://webrtc.intel.com
+http://webrtc.intel.com