REF: Use endog_names of model.
ENH: err_bound is a scalar.
ENH: Add full granger causality test
ENH: Add labels and titles for acorr plot
ENH: Fix api imports add select_order_fit to api.
ENH: Add select_order to var api as convenience.
TST: Add a note in comment
DOC: Add cleaned up VAR notebook to docs
DOC: One line summary
ENH: Deprecate initial values to forecast. Closes #756.
ENH: Fix legend in forecast plot. Closes #757.
REF: Cleanup IRF plotting. Closes #380.
ENH: Add cov_params to wrapper
ENH: Inherit from tsbase.TimeSeriesModelResults
ENH: Add conf_int to VAR with wrapper. Closes #99.
ENH: cov_params -> method. t_test and f_test placeholders