Update news for v0.1.0

Author: nanxstats

NEWS.md

@@ -1,5 +1,13 @@
 # stackgbm 0.1.0
 
-## New Features
+## Improvements
 
-- First public release.
+- Use a standard dependency management strategy (thanks, @privefl, #1).
+- The optimal parameter objects generated by `cv_*()` now can be
+  passed to the `params` argument `stackgbm()` directly when
+  bundled as a list. This change simplifies the interface and
+  saves typing (thanks, @svm-zhang, #26).
+- Rename the argument `nfolds` to `n_folds`, `ncpus` to `n_threads`
+  in `cv_*()` and set the default value of `n_threads` to 1 (#18).
+- Optimize the default parameter grid (#19).
+- Add code examples for all exported functions (#27).