[INTERNAL] Yara: verbose output to cerr instead of cout
[DOC] Yara: improved the help
[FIX, CLI] Yara: pipe to stdout
[INTERNAL] Yara: options cleanup
[INTERNAL] Yara: bumped version to 0.9.1
[TEST] Yara: updated sam file
[CLI] Yara: removed options --no-header to output a headless SAM file
Merge pull request #592 from esiragusa/feature/yara/pipe

[FEATURE] Yara: output to stdout