Increase Robustness through Multiple Watermark Guessing

[mhellmeier]

🚀 Feature Request

Current Problem

The robustness problem is described in the upstream issue #20.

Proposed Solution

Add optional parameter for the watermark extraction that gives information if multiple unique watermarks might be included (like multipleWatermarks = true). Optionally add a suggested number of watermarks counts if the previous parameter was set to true.

Additional Context

./.