[maven-release-plugin] prepare release zxing-2.3.0

git-svn-id: https://zxing.googlecode.com/svn/trunk@2948 59b500cc-1b3d-0410-9834-0bbf25fbcc57
[maven-release-plugin] rollback the release of zxing-2.3.0

git-svn-id: https://zxing.googlecode.com/svn/trunk@2949 59b500cc-1b3d-0410-9834-0bbf25fbcc57
Fix scm reference in zxing-parent pom

git-svn-id: https://zxing.googlecode.com/svn/trunk@2950 59b500cc-1b3d-0410-9834-0bbf25fbcc57