Merge remote-tracking branch 'origin/master'

Author: aoberoi

README.md

@@ -181,7 +181,7 @@ The OpenTok PHP SDK requires PHP 5.3 or greater.
 See the [Releases](https://github.com/opentok/opentok-php-sdk/releases) page for details
 about each release.
 
-## Important changes in v2.2
+## Important changes in v2.2.1
 
 This version of the SDK includes support for working with OpenTok 2.0 archives. (This API does not
 work with OpenTok 1.0 archives.)
@@ -195,6 +195,12 @@ changed to use camel case, including the following:
 Note also that the `options` parameter of the `OpenTok.createSession()` method has a `mediaMode`
 property instead of a `p2p` property.
 
+The default setting for the `createSession()` method is to create a session with the media mode set
+to relayed. In previous versions of the SDK, the default setting was to use the OpenTok Media Router
+(media mode set to routed). In a relayed session, clients will attempt to send streams directly
+between each other (peer-to-peer); if clients cannot connect due to firewall restrictions, the
+session uses the OpenTok TURN server to relay audio-video streams.
+
 The API_Config class has been removed. Store your OpenTok API key and API secret in code outside of the SDK files.
 
 See the reference documentation