[FAB-6361] Update license text in README

The license text at the bottom of the
README is a bit confusing as it might imply
that the entire project is licensed under
Creative Commons
See [FAB-6326] for details

Change-Id: Ic9178ac0d55763b5c911ec7c188312e5a6b98c88
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

README.md

@@ -2,4 +2,6 @@
 
 Please visit the [installation instructions](http://hyperledger-fabric.readthedocs.io/en/latest/samples.html).
 
-<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>
+## License <a name="license"></a>
+
+Hyperledger Project source code files are made available under the Apache License, Version 2.0 (Apache-2.0), located in the [LICENSE](LICENSE) file. Hyperledger Project documentation files are made available under the Creative Commons Attribution 4.0 International License (CC-BY-4.0), available at http://creativecommons.org/licenses/by/4.0/.