Add Examples To The DSL Docs

This is the documentation for the Gradle Tar task http://www.gradle.org/docs/current/dsl/org.gradle.api.tasks.bundling.Tar.html

This is the documentation for the Ant Tar task https://ant.apache.org/manual/Tasks/tar.html

Note how in the Ant documentation there examples of how to use it.

See http://stackoverflow.com/questions/11558824/gradle-tar-task-not-executed for how people don’t understand it properly. Even the answer there doesn’t give a proper example of which part should be using doLast and which part should be in the configuration phase.