introduce an uri: protocol for generic classloaders and uri:classloader: for the
Thread.currentThread.conttextClassLoader
adds several igh level integration tests for the uri: protocol using various servlet containers:
* jetty
* tomcat
* jboss-wildlfy
and for osgi container
* felix 3.2 + 4.4
* equinox 3.6 + 3.7
do not filter anything from output for travis