Scipion-em

- Hot fix: Assign angles assign full shifts by default. Warns about loosing xFrac and yFrac comming from extract coordinates.

- Hot fix: Import volumes annotates the filename in the volume/s

- Hot fix: protocols.conf is packaged now!

users:
- Version compatible with latest released scipion-em-chimera plugin.
developers:
- biopython updated to 1.79
- Using Alphabet from new version of biopython, related tests modified and added.
- DataViewer allow for registration of new sets using: DataViewer.registerConfig(type, configDict).
Useful for tomography sets and avoiding unnecessary inheritance.
- Icon is a png (compatible with future pillow versions)
- weakImport("tifffile") added when registering FileHandlers (bug at installation in github action)

users:
- Subset protocol optimized, specially for small parametric subsets (random or by ids)
- Assign angles protocol optimized.
- Filebrowser: thumbnails info shown always without the need of loading viewers.
- Thumbnails for mrc files (and its flavours) show also headers sampling rate.

developers:
- Plugins discovery takes into account priority packages: pwem, tomo, ..
- FileHandler registration moved to main pwem.__init__.
- Import volumes uses logging
- Import volumes fixed when downloading an EMDB.
- Dataviewer allow registration of other sets. Dataviewer: DataViewer.registerConfig(tomo.objects.SetOfTiltSeriesCoordinates)

- Plugin.guessCudaVersion returns Version("0.0") for cases like this /usr/lib/x86_64-linux-gnu