Merge pull request #17 from hazendaz/master

Minor updates - mainly to add missing condition property to allow skipping of ivy downloads
Logback 1.0.12
Merge branch 'master' of github.com:grgrzybek/tomcat-slf4j-logback
Tomcat 7.0.40
Logback 1.0.13
Apache Tomcat 7.0.41
Apache Tomcat 7.0.42
Apache Tomcat 7.0.47
updated