11607 scripts

This is a follow on to gh-1324.

 * Matlab files (`.m`) have been added though no example script is yet available.
 * An extension point has been added to allow using alternative `jython`, `python`, and `matlab` launchers.
```
bin/omero config set omero.launcher.python /opt/virtualenv/bin/python2.7
```

/cc @sbesson @ctrueden