v0.2.5

Various enhancements and bug fixes.
The most notable change is that the CPE runner is now a project of its own. The original CPERunner class, residing now in jcore-pipeline-runner-base, has been renamed to CPEBootstrapRunner. Instead of loading the classpath of the pipeline to run into the runner's JVM, a new process is started via Runtime.exec(). This help in separating the classpath from the pipeline runner from the classpath of the pipeline itself, avoiding dependency version collisions.
For this to work, the jcore-pipeline-runner-cpe JAR needs to reside on the classpath of pipeline runner or in the same directory as the pipeline runner.