update NEWS to reflect changes in version 4.0

NEWS.md

@@ -1,13 +1,17 @@
 # plmmr 4.0.0 (2024-10-07)
 
+- **Major re-structuring of preprocessing pipeline:** Data from external files must now be processed with `process_plink()` or `process_delim()`. All data (including in-memory data) must be prepared for analysis via `create_design()`. This change ensures that data are funneled into a uniform format for analysis.
 
+- **Re-worked vignettes**: The vignettes/articles for the package are now all revised to include examples of the complete pipeline with the new `create_design()` syntax. There is an article for each type of data input (matrix/data.frame, delimited file, and PLINK).
 
-# plmmr 3.2.0 (2024-09-02)
+- **CRAN submission**: We updated several items in the documentation in order to prepare for CRAN submission. 
 
-- **Major re-structuring of preprocessing pipeline:** Data from external files must now be processed with `process_plink()` or `process_delim()`. All data (including in-memory data) must be prepared for analysis via `create_design()`. This change ensures that data are funneled into a uniform format for analysis.
+# plmmr 3.2.0 (2024-09-02)
 
 - **bigsnpr now in Suggests, not Imports:** The essential filebacking support is now all done with `bigmemory` and `bigalgebra`. The `bigsnpr` package is used only for processing PLINK files. 
 
+- **dev branch gwas_scale** has a version of the pipeline that runs completely file-backed. 
+
 # plmmr 3.1.0 (2024-07-13)
 
 - **Enhancement:** To make `plmmr` have better functionality for writing scripts, the functions `process_plink()`, `plmmm()`, and `cv_plmm()` now (optionally) write '.log' files, as in PLINK.