CRAN release 1.1.7-1

New CRAN version with mostly internal tweaking and more examples:

bssm 1.1.7-1 (Release date: 2021-09-21)

• Fixed an error in automatic tests due to lack of fixed RNG seed.

bssm 1.1.7 (Release date: 2021-09-20)

• Added a function cpp_example_model which can be used to extract and
  compile some non-linear and SDE models used in the examples and vignettes.
• Added as_draws method for run_mcmc output so samples can be analysed using
  the posterior package.
• Added more examples.
• Fixed a tolerance of one MCMC test to pass the test on OSX as well.
• Fixed a bug in iterated extended Kalman smoothing which resulted incorrect
  estimates.