updated to markdown. added Development section and link to parent readme

Author: TimidRobot

tools/README

@@ -0,0 +1,33 @@
+# tools
+
+Tools for working with creativecommons.org's legal code content.
+
+
+## Develpment
+
+Prior to submitting a pull request, please validate the style/syntax (from
+within this tools directory):
+1. [Black](https://black.readthedocs.io/en/stable/): The uncompromising code
+   formatter
+    ```shell
+    black ./
+    ```
+2. [Flake8](http://flake8.pycqa.org/en/latest/): Your Tool For Style Guide
+   Enforcement
+    ```shell
+    flake8 ./
+    ```
+
+
+## License
+
+The license applies only to the tools in this directory:
+-   [`LICENSE`](LICENSE) ([GPL-3.0-only] License)
+
+[gplv3]: https://opensource.org/licenses/GPL-3.0 "GNU General Public License version 3 | Open Source Initiative"
+
+
+## Parent README
+
+See the parent README for Code of Conduct and Contributing guidelines:
+- [`../README.md`](../README.md)