STARR: use 2.11.0-M4, built with 2.11.0-M3

Replaced starr jars with 2.11.0-M4, built with Scala 2.11.0-M3.

I used `ant replacestarr-opt -Dstarr.use.released=1`, with `starr.number`:

```
starr.version=2.11.0-M3
```

Then pushed the jars to artifactory after moving `lib/jline.jar` out of the way,
as it's no longer "desired" (i.e., not pulled from artifactory). Its presence
seemed to break `./push-binary-libs.sh $ARTIFACTORY_USER $ARTIFACTORY_PASS`.

You can by-pass the custom starr artifact download and use a (released) version
of Scala by changing your `build.properties` to include

```
starr.use.released=1
```

You may optionally change `starr.version` in `starr.number` to whichever version
that maven can resolve for you.
Merge pull request #2744 from adriaanm/starr-2.11.0-M4

STARR: use 2.11.0-M4, built with 2.11.0-M3