Rename doc/procedures -> doc/procedure.

Author: Pavel Kovalenko

README.md

@@ -9,6 +9,7 @@ and work on the source code.
 
 If you find a bug or have an enhancement request, file an [Issue](https://github.com/openxray/xray-16/issues).
 
-Pull requests appreciated! Just check out [the task list](https://github.com/openxray/xray-16/blob/master/doc/design/tasks.txt) 
-and follow [coding](https://github.com/openxray/xray-16/blob/master/doc/procedures/cpp_code.txt) 
-and [committing](https://github.com/openxray/xray-16/blob/master/doc/procedures/commit_coding.txt) conventions.
+Pull requests appreciated! Just check out 
+[the task list](https://github.com/openxray/xray-16/blob/master/doc/design/tasks.txt) 
+and follow [coding](https://github.com/openxray/xray-16/blob/master/doc/procedure/cpp_code.txt) 
+and [committing](https://github.com/openxray/xray-16/blob/master/doc/procedure/commit_coding.txt) conventions.