This release fixes some cohorts being empty (e.g. T3.2a, see #80) and filters cohorts for entries with an end date before the start date (which was caused by the re-indexing of the start date due to avoiding immortal time bias, see #84). It also contains various other performance improvements and bug fixes (see v0.4.3.2...v0.4.4) and adds instructions to run the package with Docker.