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Copyright Information for FlightPath 
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Last updated: 10/7/2020
  
All FlightPath code is Copyright 2006 - Present by the original authors.

FlightPath is considered "open source" under the GNU General Public License (GNU GPL), 
version 3 or any later version. This covers any related files and documentation packaged with FlightPath.

This means that you may modify and redistribute part or all of FlightPath's code, but it must remain open 
source, under the GNU GPL.  You may NOT use any part of FlightPath's code in a purely commercial product 
whose source code is not also released under the GNU GPL, version 3 or any later version.

In other words, you can only copy FlightPath's code if your project is ALSO open source, 
specifically under the GNU GPL.  It cannot be proprietary or "closed source."

Note that you are not required to release your code under 
typical use (see link below for explanation), but you are required to release it under 
certain conditions  

See this page for our interpretation of the GNU GPL: http://getflightpath.com/gnu-gpl

For add-on modules, unless otherwise stated in a separate COPYRIGHT.txt or LICENSE.txt file, 
all FlightPath modules are also released under the GNU GPL version 3 or any later version, 
and fall under the same restrictions and protections.

The license is defined in full here: https://www.gnu.org/licenses/gpl-3.0.en.html, and reproduced 
in the LICENSE.txt file which is included with FlightPath.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without 
even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU  
General Public License for more details.

FlightPath includes works under other copyright notices and distributed according to the terms of the 
GNU General Public License or a compatible license.

You may modify FlightPath's source code, but this copyright and license notice must not be modified, 
and must be included with the source code.