MARSS 3.1 released on CRAN

MARSS 3.1 is now up on CRAN.  This allows for time-varying constraints and covariates.  See the updated User Guide (on CRAN).  The major changes are internal and allow for us easily write customized functions for different MARSS forms (like AR-p processes and DFA models).   3.1 is considerably slower than 2.x, however this should be fixed in 3.2 or 3.3 when the Kalman filter in the KFAS package can be hooked back up to MARSS (temporarily disabled). http://cran.r-project.org/web/packages/MARSS