Rationalised the software license

The licenses specified in the several package.xml files were inconsistent and in some cases were still just example placeholders.

I have replaced all the licenses specified in the packages with the MIT license and included the MIT license text file in the root of the Swarmathon code directory.

I listed all contributors that have written code and are therefore listed by github as an author. I also listed people who contributed code before it was under git control. Melanie Moses is the PI for the Swarmathon and director of the Biological Computation Lab that houses the Swarmathon project. There may be some students who contributed ideas that we used in the swarmathon code. Apologies to those not included here.

The list of authors is a live document. As additional authors make contributions to the Swarmathon project their names should be added to the author list.

The MIT license is permissive (the only restriction is that the authors are credited in derivative work) and is the most widely used license in in the open-source community.

Author: gmfricke

license.txt

@@ -0,0 +1,19 @@
+Copyright (c) 2017 G. Matthew Fricke, Josh P. Hecker, Antonio D. Griego, Jarett C. Jones, J. Jake Nichol, Karl Stollis, Kelsey Geiger, Tobi Ogunyale, Manny Meraz, Jeff Schlindwein, Will Vining, and Melanie E. Moses.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/abridge/package.xml

@@ -6,7 +6,7 @@
 
   <maintainer email="swarmathon@cs.unm.edu">NASA Swarmathon</maintainer>
 
-  <license>GPLv2</license>
+  <license>MIT</license>
 
   <buildtool_depend>catkin</buildtool_depend>
   <build_depend>geometry_msgs</build_depend>

src/behaviours/package.xml

@@ -6,7 +6,7 @@
 
   <maintainer email="swarmathon@cs.unm.edu">NASA Swarmathon</maintainer>
 
-  <license>GPLv2</license>
+  <license>MIT</license>
 
   <buildtool_depend>catkin</buildtool_depend>
   <build_depend>geometry_msgs</build_depend>

src/diagnostics/package.xml

@@ -4,7 +4,7 @@
   <version>0.0.0</version>
   <description>The diagnostics package</description>
   <maintainer email="swarmathon@cs.unm.edu">NASA Swarmathon</maintainer>
-  <license>GPLv2</license>
+  <license>MIT</license>
   <buildtool_depend>catkin</buildtool_depend>
   <build_depend>roscpp</build_depend>
   <build_depend>std_msgs</build_depend>

src/gazebo_plugins/package.xml

@@ -10,10 +10,7 @@
   <maintainer email="matthew@todo.todo">matthew</maintainer>
 
 
-  <!-- One license tag required, multiple allowed, one license per tag -->
-  <!-- Commonly used license strings: -->
-  <!--   BSD, MIT, Boost Software License, GPLv2, GPLv3, LGPLv2.1, LGPLv3 -->
-  <license>TODO</license>
+  <license>MIT</license>
 
 
   <!-- Url tags are optional, but mutiple are allowed, one per tag -->

src/rqt_rover_gui/package.xml

@@ -3,9 +3,9 @@
   <version>0.0.1</version>
   <description>The Rover Interface</description>
 
-  <maintainer email="matthew@fricke.co.uk">Matthew Fricke</maintainer>
+  <maintainer email="swarmathon@cs.unm.edu">NASA Swarmathon</maintainer>
 
-  <license>GPLv3</license>
+  <license>MIT</license>
 
   <buildtool_depend>catkin</buildtool_depend>
 

src/sbridge/package.xml

@@ -6,7 +6,7 @@
 
   <maintainer email="swarmathon@cs.unm.edu">NASA Swarmathon</maintainer>
 
-  <license>GPLv2</license>
+  <license>MIT</license>
 
   <buildtool_depend>catkin</buildtool_depend>