IBM Watson IoT Java Client Library Version 0.2.7

Merge pull request ibm-watson-iot#111 from amitmangalvedkar/master

Added testcases for all IM APIs

Merge pull request ibm-watson-iot#92 from sathipal/master

Fix NPE in terminate call

Update README.md

Prepare a new release 0.2.2

Merge pull request ibm-watson-iot#67 from miketran78727/master

Correct error handling in addDeviceManagementExtension() method

Update the latest library version

Merge pull request ibm-watson-iot#59 from sathipal/master

Fix to handle when default charset is not UTF-8

updated new maven release

Fix reconnect logic and prepare for new release