Added RPySOM as submodule

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Fix paths for RTruffleSOM

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Added RPySOM to benchmarks

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Added build script and refactored out common part

Signed-off-by: Stefan Marr <git@stefan-marr.de>