adds keyboard layout file and updates readme

README.md

@@ -1 +1,32 @@
-# eng_rus_keyboard_mapping
+# English - Russian keyboard mapping
+
+This is my custom mapping for russian alphabet in my english keyboard in Ubuntu.
+I did this to avoid buying keyboard stickers for the usual Russian keyboard layout while I was learning Russian language.
+
+
+## How to install
+
+_Ubuntu 20.04.4 LTS_
+
+1) Copy the file `rc` to the directory `/usr/share/X11/xkb/symbols`
+2) Edit the file `/usr/share/X11/xkb/rules/evdev.xml:
+   1) Find the section layoutlist.
+   2) Add the following:
+    ```xml
+    <layout>
+      <configItem>
+        <name>rc</name>
+        <shortDescription>rc</shortDescription>
+        <description>RussianCustom</description>
+        <languageList>
+          <iso639Id>cod</iso639Id>
+        </languageList>
+      </configItem>
+      <variantList>
+      </variantList>
+    </layout>
+   ```
+   
+## Mapping
+
+![Mapping](mapping.png)