Support non-Bazel builds for third-party analyzers

[llbit]

I am trying to set up a Gradle build for a standalone analyzer. It's difficult to figure out which dependencies are needed just from looking at the shipshape build. Also, some of the dependencies do not seem to be available as Jars. Some things we can do to better support other build systems are:

• Document all dependencies - artifact names and versions
• Make sure dependencies are available on a Maven repository
• Provide an example for using e.g. Gradle

[llbit]

I solved the dependency hassle by running

$ bazel build //shipshape/java/com/google/shipshape/service:java_dispatcher_deploy.jar

and then using the produced deploy.jar as compile dependency. This does not seem like the best way to do it though.