fix Issue 14715 - Add README.md to the tools Repository

README.md

@@ -0,0 +1,26 @@
+D tools
+=======
+
+This repository hosts various tools redistributed with DMD or used
+internally during various build tasks.
+
+Program         | Scope    | Description
+--------------- | -------- | -----------------------------------------
+catdoc          | Build    | Concatenates Ddoc files.
+changed         | Internal | Change log generator.
+chmodzip        | Build    | ZIP file attributes editor.
+ddemangle       | Public   | D symbol demangler.
+detab           | Internal | Replaces tabs with spaces.
+dget            | Internal | D source code downloader.
+dman            | Public   | D documentation lookup tool.
+dustmite        | Public   | [Test case minimization tool](https://github.com/CyberShadow/DustMite/wiki).
+get_dlibcurl32  | Internal | Win32 libcurl downloader/converter.
+rdmd            | Public   | [D build tool](http://dlang.org/rdmd.html).
+rdmd_test       | Internal | rdmd test suite.
+tolf            | Internal | Line endings converter.
+
+To report a problem or browse the list of open bugs, please visit the
+[bug tracker](http://issues.dlang.org/).
+
+For a list and descriptions of D development tools, please visit the
+[D wiki](http://wiki.dlang.org/Development_tools).