fix: add back deleted segments in files

Author: zmx27

.codespell/ignore_words.txt

@@ -4,5 +4,11 @@
 ;; abbreviation for "materials" often used in a journal title
 mater
 
+;; alternative use of socioeconomic
+socio-economic
+
 ;; Frobenius norm used in np.linalg.norm
 fro
+
+;; library used for Python package release, no longer used
+rever

.gitignore

@@ -91,3 +91,7 @@ target/
 
 # Ipython Notebook
 .ipynb_checkpoints
+
+# version information
+setup.cfg
+/src/diffpy/*/version.cfg