0.22.5

Added

• Memory short circuiting now also applied to the multicore backend.

• Fixes for AD of scan with nonscalar operators. Work by Lotte
  Bruun and Ulrik Larsen.

• Generalised histograms now supported in AD. Work by Lotte Bruun and
  Ulrik Larsen.

• OpenCL kernels now embed group size information, which can
  potentially be used for better register allocation by the OpenCL
  implementation.

Fixed

• A hole in the type checker that allowed one to sneak functions out
  if conditionals (#1787).

• futhark repl: unsigned integers are now printed correctly.

• A bug in the type-checking of match (#1783).

• Missing sequencing in type-checking of in-place let expressions (#1786).

• Crash in defunctionaliser caused by duplicate parameter names
  (#1780).

• Infelicities in multicore codegen for scans (#1777).