Same as `java -jar plantum.jar -language`, a new servlet is added to
expose the tokens supported by the current version of the PlantUML engine.
Useful to support tools relying on a running PlantUML server to support
syntax highlight.
Improved unit tests to be independent of externally running servlet container, now every test runs its own embedded jetty server (and stops it afterward).
Removed all eclipse artifacts (.project, .classpath, .settings, etc.) and added to .gitignore to be independent of development environment (can be autogenerated by maven, or better yet use m2eclipse).
Removed embedded dependency jars since they are handled automatically by maven.