README: rename and update content

The existing README is old and inappropriate, let's restart with a
fresh README file.

Signed-off-by: Nicolas Dechesne <[email protected]>

Author: ndechesne

README.md

@@ -0,0 +1,15 @@
+# qcom-tool
+
+qcom-ptool contains various device partitioning utilities like ptool.py, gen_partitions.py and various sample partition configuration files needed for Qualcomm SoCs.
+
+# Development
+
+See [CONTRIBUTING.md file](CONTRIBUTING.md) for instructions on how to send
+code contributions to this project. You can also [report an issue on
+GitHub](../../issues).
+
+# License
+
+This project is licensed under the [BSD-3-clause
+License](https://spdx.org/licenses/BSD-3-Clause.html). See
+[LICENSE.txt](LICENSE.txt) for the full license text.