casacore v3.1.0

Fix bug, thread issues and added some new features.

General

• Removed many warnings issued by newer compiler versions (#798, #809, #819, #820, #866, #883)
• Further improved thread-safety (#817, #869, #877, #886)
• Added variance and standard deviation of complex numbers (#851)

Tables

• Improved parallel storage manager based on ADIOS2
• Support of Int64 table columns (#859)
• Added O_DIRECT support when using MultiFile (#885)
• TaQL improvements (#813, #851, #867)
• Small CTDS fixes (#840, #868)

Measurement Set

• Small improvements (#858, #864, #872)
• Better handling of FITS-IDI data bit sampling (#836)

Images

• Support for non-chunked HDF5 data sets (#879, #880)
• Fixed count overflow on very large images (#849)