Fixes #51: mvn versions:update-properties versions:use-latest-releases (maven-jxr-plugin, joda-beans, maven-release-plugin, jacoco-maven-plugin, doxia-module-markdown, maven-checkstyle-plugin, findbugs-maven-plugin, extra-enforcer-rules, plexus-utils)

Updated ${maven-jxr-plugin.version} from 2.3 to 2.4
Updated ${org.joda.joda-beans.version} from 0.8.5 to 0.9.0
Updated ${maven-release-plugin.version} from 2.4.1 to 2.4.2
Updated ${jacoco-maven-plugin.version} from 0.6.3.201306030806 to 0.6.4.201312101107
Updated ${doxia-module-markdown.version} from 1.4 to 1.5
Updated ${maven-checkstyle-plugin.version} from 2.10 to 2.11
Updated ${findbugs-maven-plugin.version} from 2.5.2 to 2.5.3
Updated ${extra-enforcer-rules.version} from 1.0-beta-1 to 1.0-beta-2
Updated org.codehaus.plexus:plexus-utils:jar:3.0.15 to version 3.0.16