Add LICENSE

Author: rodrigomelo9

LICENSE

@@ -0,0 +1,13 @@
+Copyright (C) 2020-2021 Rodrigo A. Melo
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

README.md

@@ -1,6 +1,6 @@
-# Proofs of concept [![License](https://img.shields.io/badge/License-ISC-darkgreen?style=flat-square)](LICENSE)
+# Proofs of concept about FPGA EDA tools
 
-Proofs of concept about FPGA EDA tools.
+[![License](https://img.shields.io/github/license/PyFPGA/poc.svg?longCache=true)](https://github.com/PyFPGA/poc/blob/main/LICENSE)
 
 These are used to implement the functionality of [PyFPGA](https://github.com/PyFPGA/pyfpga)
 and its [Openflow](https://github.com/PyFPGA/openflow).