Release 4.0-beta16

• Speed: further speed up tree operations.
• Output: simplify results from ancestral sequence reconstruction.
• Input: allow defining models using multiple lines in control files.
• Models:
  • Speed up and improve RNA editing model.
  • Allow '--tree=~uniform_tree(taxa,gamma(0.5,2/length(taxa)))'
  • Allow Yule, coalescent, and uniform_rooted tree distributions.
• MCMC:
  • preliminary inference of rooted trees with alignments (NNI only, no SPR)
  • Use multiple transition kernels for uniform_int distribution.
  • Allow hand-written Metropolis-Hastings proposals for numbers/atomic objects.
• Bug fixes:
  • Fix crashes crashes on startup (in module writing/reading).
• Tests:
  • Refactor tests so that ninja test runs each testsuite test separately.
  • Add CI for ninja test.
• Haskell:
  • Fix [1.5 .. ] and ['a' ..] work for floating point.