cta-observatory/ctapipe: v0.8.1

This release should be compatible with v0.8.0, but with some bug fixes, speed improvements, and non-breaking features added. Notably the DL1 format generated by v0.8.0 was missing the telescope trigger time, due to a bug which was fixed in this version. What's Changed since v0.8.0 Use lts regression instead of siegel slopes for timing parameters (#1419) @MaxNoe add column description to attrs (#1437) @kosack Calculate log likelihood analytically in muon intensity fit (#1390) @MaxNoe Fix reading of optics table, write version number, fixes #1416, fixes #1359 (#1417) @MaxNoe Remove unused code (#1378) @MaxNoe Make reading subarray name optional, fixes reading of 0.8.0 dl1 files (#1428) @MaxNoe Add config options to disable integration correction, fixes #1418, fixes #1376 (#1429) @MaxNoe TailCutsDataVolumeReducer now instantiates TailCutsImageCleaner, fixes #1399 (#1404) @Hckjs Fix writing of camera description in subarray.to_hdf, fixes #1422 (#1423) @MaxNoe Add missing factor of 0.5 in muon efficiency fit, fixes #1377 (#1379) @MaxNoe cosmetic change to CameraDisplay (#1409) @kosack Read and write subarray to hdf methods (#1405) @MaxNoe Fix CameraGeometry coordinate conversion for spherical frames (#1407) @kosack Update EventSeeker (#1401) @watsonjj Add support to read multiple containers from one table at once (#1374) @LukasNickel Fix README formatting. (#1402) @nbiederbeck Use sparse matrix approach for neighbor window sum (#1398) @MaxNoe Override from_name for TelescopeComponent to be able to provide subarray (#1393) @MaxNoe Mask for muons, fixes #1373 (#1389) @moralejo Make gain_selector a trait of SimTelEventSource, fixes eventsource plugins (#1385) @MaxNoe Add missing is_simulation guards to stage1 tool (#1386) @MaxNoe Fix missing units of MuonEfficiencyContainer defaults (#1380) @MaxNoe Make sure event source provides R1 or DL0, fix datalevels of SimTelEventSource (#1387) @MaxNoe Update README (DOI + install) (#1366) @vuillaut Improve clarity of FixedWindowSum (#1370) @watsonjj Add support to read from prefixed columns (#1364) @LukasNickel fix exclusion pattern that accidentally removed tels_with_trigger (#1369) @kosack Fix FACT focal length in guessing key (#1365) @MaxNoe improve TwoPassWindowSum extractor (#1356) @kosack numba_of_islands (#1361) @MaxNoe Compare .value of quantity to 0 in cocentration (#1363) @MaxNoe Contributors @Bultako, @Hckjs, @LukasNickel, @MaxNoe, @kosack, @moralejo, @nbiederbeck, @vuillaut and @watsonj