[maven-release-plugin] prepare release 0.2.0
[maven-release-plugin] prepare release 0.2.0

yvnicolas/aerogear-unifiedpush-java-client,lewis-ing/aerogear-unifiedpush-java-client,aerogear/aerogear-unifiedpush-java-client,matzew/aerogear-unifiedpush-java-client