[FIX] Porting gustaf to new stream module.

Work not complete, some app tests still fail.
[FIX] Fixing a remaining problem with Gustaf.

The arguments of `readRecord()` were switched.

Also, the program does not write out the file `st2_l100.vcf` (any more?).
Removing, and disabling comparison in tests.  File was empty anyway and
Gustaf appears to not write out empty files but prints a warning (warning
was already there in gold standard stderr).
Merge pull request #39 from holtgrewe/feature/stream/adjust-gustaf

[FIX] Porting gustaf to new stream module.