Correctly implement real-time filtering

[damb]

Features and Changes:

• Avoid distortions when preparing template waveform data (due to SeisComP real-time IIR filters). Make use of a filter margin and trim the data after filtering.
• Implement the cross-correlation as an in-place filter. Note that this makes #28 obsolete. Cover the cross-correlation filter with unittests. This completely replaces the previous cross-correlation implementation.
• Feed data chunk-wise to Template waveform processors. Control the chunk size. Correctly apply both SeisComP filters and the in-place cross-correlation. Make use of the fact that SeisComP filters are implemented recursively.
• Provide several additional integration tests.

Usage and Configuration:

• If no "filter" (or "templateFilter", respectively) is specified apply the filter configured with the DataModel::Pick::filterID(). In case the user wants to force that no filter is used an empty filter identifier string must be configured.
• Drop --debug-info facilities. With the usage of the inplace cross-correlation filter dumping waveform information is actually not sensible anymore.

Bugfixes:

• Correctly set the waveform processor's stream last_sample property.

[damb]

Note that the bugfix mentioned above seems to be required for https://github.com/SeisComP/common/blob/d81e4360e29e5f19d21069235b2821a68e70404a/libs/seiscomp/processing/waveformprocessor.cpp#L278-L368. I'm going to provide a PR after my vacation.

[damb]

A few leftovers and as a reminder for myself:

• [ ] Check if the pick offset with regards to the template waveform should be considered from the end, instead from the beginning. This avoids some computation.

Note that, since this change requires to adjust the alignment correction, too, it's cleaner to provide a dedicated PR. Thus, here, I won't fix this issue.

• [x] Correct FE_INVALID issue of integration-single-stream-filtered

[damb]

Note that the bugfix mentioned above seems to be required for https://github.com/SeisComP/common/blob/d81e4360e29e5f19d21069235b2821a68e70404a/libs/seiscomp/processing/waveformprocessor.cpp#L278-L368. I'm going to provide a PR after my vacation.

References https://github.com/SeisComP/common/pull/15.