Dclab

- Allow to instantiate RTDC_DataSet without a tdms file
- Add statistics submodule
- Bugfixes:
- Faulty hashing strategy in `RTDC_DataSet.GetDownSampledScatter`
- Code cleanup (renamed methods, cleaned structure)
- Corrections/additions in definitions (fRT-DC)

- Added channel: distance between to first fl. peaks
- Added fluorescence channels: peak position, peak area, number of peaks
- Allow to disable KDE computation
- Add filter array for manual (user-defined) filtering
- Add config parameters for log axis scaling
- Add channels: bounding box x- and y-size
- Bugfixes:
- cached.py did not handle `None`
- Limiting number of events caused integer/bool error

- Added `RTDC_DataSet.ExportTSV` for data export
- Bugfixes:
- Correct determination of video file in RTDCDataSet
- Fix multivariate KDE computation
- Contour accuracy for Defo overridden by that of Circ

- Fix regressions with filtering.
https://github.com/ZELLMECHANIK-DRESDEN/ShapeOut/issues/43
- Ignore empty columns in .tdms files (1)
- Moved RTDC_DataSet and PolygonFilter classes to separate files
- Introduce more transparent caching - improves speed in some cases

- Added support for 3-channel fluorescence data (FL-1..3 max/width)

- Fixed minor polygon filter problems.
- Fix a couple of Shape-Out-related issues:
- https://github.com/ZELLMECHANIK-DRESDEN/ShapeOut/issues/17
- https://github.com/ZELLMECHANIK-DRESDEN/ShapeOut/issues/20
- https://github.com/ZELLMECHANIK-DRESDEN/ShapeOut/issues/37
- https://github.com/ZELLMECHANIK-DRESDEN/ShapeOut/issues/38