[#23] Rename plugins to modules

modules/history-substring-search/README.md

@@ -0,0 +1,36 @@
+history-substring-search
+========================
+
+It implements the [Fish shell][1]'s history search feature, where the user can
+type in any part of a previously entered command and press the `UP` and `DOWN`
+arrow keys to cycle through matching commands.
+
+Settings
+--------
+
+### Case Sensitivity
+
+To enable case-sensitivity for this module only, add the following line to
+*zshrc*:
+
+    zstyle ':omz:module:history-substring-search' case-sensitive 'yes'
+
+### Highlighting
+
+If colors are enabled, _history-substring-search_ will automatically highlight
+positive results.
+
+To enable highlighting for this module only, and the following line to *zshrc*:
+
+    zstyle -t ':omz:module:history-substring-search' color 'yes'
+
+Authors
+-------
+
+*The authors of this module should be contacted via the GitHub issue tracker.*
+
+ - [Sorin Ionescu](/sorin-ionescu)
+ - [Suraj N. Kurapati](/sunaku)
+
+[1]: http://fishshell.com
+