SI-8503 -version is info setting 

And the Scala runner exits with 0 for info settings.

```
apm@mara:~$ javac -version 2> /dev/null
apm@mara:~$ echo $?
0
apm@mara:~$ java -version 2> /dev/null
apm@mara:~$ echo $?
0
apm@mara:~$ java -help 2> /dev/null
apm@mara:~$ echo $?
0
apm@mara:~$ java -junk 2> /dev/null
apm@mara:~$ echo $?
1
apm@mara:~$ skala -version
Scala code runner version 2.11.2-20140528-130424-c8f8782f6a -- Copyright 2002-2013, LAMP/EPFL
apm@mara:~$ echo $?
0
apm@mara:~$ skalac -version
Scala compiler version 2.11.2-20140528-130424-c8f8782f6a -- Copyright 2002-2013, LAMP/EPFL
apm@mara:~$ echo $?
0
apm@mara:~$ skalac -junk 2> /dev/null
apm@mara:~$ echo $?
1
```
Review by @adriaanm in case this breaks one of his scripts

whence the percentage?