Bring in Logbridge module.

[Logbridge](https://github.com/jythontools/logbridge) is a bridge between Python's [logging](https://docs.python.org/2/library/logging.html) API and [Simple Logging Facade for Java (SLF4J)](http://www.slf4j.org/).

The example already works fairly well in McV straight from the Jython Shell (just need to remove the “invoke0” bit):
```
[java] 09:02:47.202 [Thread-123] DEBUG ROOT - invoke0: debug message
[java] 09:02:47.203 [Thread-123] INFO ROOT - invoke0: info message
[java] 09:02:47.204 [Thread-123] WARN ROOT - invoke0: warn message
[java] 09:02:47.205 [Thread-123] ERROR ROOT - invoke0: error message
[java] 09:02:47.206 [Thread-123] ERROR ROOT - invoke0: critical message
```