README.md: added link to LICENSE.md

README.md

@@ -7,7 +7,7 @@
 This repository contains the PX4 Flight Core, with the main applications located in the src/modules directory. It also contains the PX4 Drone Platform, which contains drivers and middleware to run drones.
 
 *   Official Website: http://px4.io
-*   License: BSD 3-clause (see LICENSE.md)
+*   License: BSD 3-clause (see [LICENSE.md](https://github.com/PX4/Firmware/blob/master/LICENSE.md))
 *   Supported airframes (more experimental are supported):
   * [Multicopters](http://px4.io/platforms/multicopters/start)
   * [Fixed wing](http://px4.io/platforms/planes/start)