Always invoke #run: as main method if available, only fallback to #run if necessary

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Identify this standard library as SOM

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Added Double>>#round

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