Merge pull request #9 from damienfinck/master

[FIXED JENKINS-19432] Option unstable if warnings + Small fixes
[maven-release-plugin] prepare release msbuild-1.20
[maven-release-plugin] prepare for next development iteration
[JENKINS-19830] Warn about passwords in log.
Merge pull request #10 from jglick/mask-args-JENKINS-19830

[FIXED JENKINS-19830] Warn about passwords in log
[maven-release-plugin] prepare release msbuild-1.21
[maven-release-plugin] prepare for next development iteration