Add licensing and contribution info

CONTRIBUTING.md

@@ -1,5 +1,15 @@
 Please do contribute!
 
+## Licensing
+
+All contributions are made under the same MIT License as the rest of the
+project, except documentation which is licensed under the Creative
+Commons Attribution 4.0 International License. You retain the copyright
+to code you have written.
+
+When accepting your first contribution, the maintainer of the project
+will ensure that you are added to the CONTRIBUTORS file.
+
 ## Building
 
 [See the wiki](https://github.com/calmh/syncthing/wiki/Building)

CONTRIBUTORS

@@ -0,0 +1,4 @@
+Aaron Bieber <[email protected]>
+Brandon Philips <[email protected]>
+James Patterson <[email protected]>
+Philippe Schommers <[email protected]>

LICENSE

@@ -1,4 +1,4 @@
-Copyright (C) 2013-2014 Jakob Borg
+Copyright (C) 2014 Jakob Borg and other contributors (see the CONTRIBUTORS file).
 
 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