INTSAMPLES-10 added Twitter samples

basic/twitter/readme.txt

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+This example demonstrates the following aspects of the Twitter support available with Spring Integration:
+1. Twitter Inbound Channel Adapter - allows you to receive HOME status updates
+2. Twitter Inbound Search Channel Adapter - allows you to receive HOME status updates
+3. Twitter Outboud Channel Adapter - allows send status updates
+
+In order to run this sample you need to configure OAuth and set the values in the OAuth properties.
+================
+To use OAuth authentication/authorization with Twitter you must create new Application on Twitter Developers site. 
+Follow the directions below to create a new application and obtain consumer keys and access token:
+
+	- Go to http://dev.twitter.com/
+	- Click on 'Register an app' link and fill out all required fields on the form provided; 
+	- Set 'Application Type' to 'Client' and depending on the nature of your application select 
+	  'Default Access Type' as 'Read & Write' or 'Read-only' and Submit the form. 
+	- If everything is successful you'll be presented with the 'Consumer Key' and 'Consumer Secret'. 
+	- Copy both values in the safe place.
+
+	On the same page you should see 'My Access Token' button on the side bar (right). 
+	- Click on it and you'll be presented with two more values: 'Access Token' and 'Access Token Secret'. 
+	Copy these values in a safe place as well.
+	
+When done fill out oauth.properties file so it looks similar to this.
+
+twitter.oauth.consumerKey=4XzBPabcJQxyBzzzH3TrRQ
+twitter.oauth.consumerSecret=ab2piKdMfPu8bVa3ab6DAIvIWEVZyMDL0RSEN2I8
+twitter.oauth.accessToken=21691649-4XYZY5iJEOfz2A9qCFd9SjBRGb3HLmIm4HNE6AMv4
+twitter.oauth.accessTokenSecret=AbRxUAvyNCtqQtvxFK8w5ZMtMj20KFhB6oEfTA0
+
+NOTE: the above values are not real ;)
+=======================
+
+Now you ready to execute samples. Just run each sample and look for the output produced by the 
+inbound adapters (TwitterSearchSample.java and TwitterTimelineUpdateSample.java)
+ 
+The outbound adapter sample (TwitterSendUpdatesSample.java) will not produce any output. 
+Instead within seconds you should see your tweet.