INTEXT-68 - Update MQTT dependency

* Update Readme (No manual installation of the MQTT client to MavenLocal necessary any longer)
Merge pull request #47 from ghillert/INTEXT-68

INTEXT-68 - Update MQTT dependency
INTEXT-70 - Set code coverage plugin for Sonar

* Set the Sonar code coverage plugin explicitly to `jacoco`
Merge pull request #49 from ghillert/INTEXT-70

INTEXT-70 - Set code coverage plugin for Sonar
INTEXT-71 Update MQTT Extension to SI 3.0.0.M2
INTEXT-71 Add Maven To README.md
INTEXT-71 Fix Typo in README
[artifactory-release] Release version 1.0.0.M1
Revert version to 1.0.0.BUILD-SNAPSHOT