add scripts to run standalone server to release zip

Proposing to add these scripts e.g. in a ``bin`` directory to the release zip, in order to run the standalone server (brouter.jar) for desktop applications. Additionally adding an empty ``segments2`` directory for storing the data files. 

I couldn't find a build script for the release, just put the scripts under ``misc/scripts/standalone``. Use case is to provide the server part for [brouter-web](https://github.com/nrenner/brouter-web) - that would be hosted online - with the normal BRouter revisions (unlike my first idea to provide a separate all-in-one download).

The installation procedure would then be:
Install
1. download latest BRouter revision - as an example [a modified version ](http://www.norbertrenner.de/share/brouter_0_9_8.zip) with bin and segments2 dirs
2. download a [data file](http://h2096617.stratoserver.net/brouter/segments2/) and save into segments2 dir

Run
1. start server in the bin directory with ``server.sh`` or ``server.cmd`` (Windows)
2. open http://nrenner.github.io/brouter-web/

What do you think?