Shapeout

- Remember directory for searching missing measurement data
- Bugfixes:
- Cannot open old session files with hierarchies when the measurement
data location has changed (174)
- Cannot open polygon filters exported versions < 0.7.6 (174)
- Code cleanup:
- Move program-relevant data to "shapeout" directory
- Move computation of isoelastics to dclab (dclab 0.2.6.dev23)
- Create separate directory for appveyor recipe
- Remove unused/incomplete support for internationalization

- Add on-the-fly computation of contour inertia ratios
- Add menu options to save current event image (164)
- Bugfixes:
- Isoelastics are not shown (145)

- Introduce unique identifiers for measurements (dclab 0.2.5.dev4)
- Include ffmpeg in the Windows installer (165)
- Bugfixes:
- dclab 0.2.6.dev2: Correctly identify contour files (166, 169)
- dclab 0.2.5.dev11: Allow contour data indices larger than uint8 (167)
- Refactoring:
- dclab 0.2.5.dev10: Event images are returned as 2D ndarray

- Add "Preferences" menu:
- Allow to (dis/en)able session autosaving
- Allow to (dis/en)able checking for updates
- Allow to (dis/en)able expert mode (157)
- Bugfixes:
- Hidden axes ("area_cvx", "area_msd", "frame") visible in analysis tab
- Display of fluorescence traces broken (159)
- Display of contour plots broken (160)
- Error when loading sessions created with version 0.7.6 on Windows
- dclab 0.2.5.dev1: Automatically fix ancillary column sizes
- dclab 0.2.5.dev2: Correctly distinguish b/w hierarchy children of same parent

- Add on-the-fly computation of average and SD for brightness
- Bugfixes:
- Save sessions with deep (>1) hierarchies correctly
- Better backwards compatibility for old session files
- Refactoring (dclab 0.2.5):
- New standard column names
- New class for handling filtering
- Minor speed-up when dealing with hierarchies

- Move from OpenCV to imageio (129)
- Allow to select region and flow rate in batch processing (132)
- Allow to create an inverted copy of a polygon filter (127)
- Define new configuration file path with appdirs
- Add on-the-fly computation of volume (dclab 0.2.3.dev23)
- Change: Disable "remove invalid events" in filtering to
avoid computation of ancillary columns (performance)