Removed all broken links and added more description about the client library
Removed all broken links and added more description about the client library

amitmangalvedkar/iot-java,ibm-watson-iot/iot-java,sathipal/iot-java,amprasanna/iot-java,ibm-watson-iot/iot-java,BorisDaich/iot-java,ibm-messaging/iot-java