Fix release announcement, #598 is not yet fixed.
(cherry picked from commit 658aa7c7fa2ad38fd074d93ce3f0d46433f56248)
Fix bug where NaN in residual of steady state were not detected with steady_state_model
(cherry picked from commit cf4f7f362fca1ff7aa81e501300d8ad6571ab47e)
Make error message for insufficient simulation length more informative.
(cherry picked from commit 13df4979d81ac456b7de61a8d6fd10a95b7eb7c4)