Added DCO and updated repository description.

Signed-off-by: Norv <norv@simplemachines.org>

DCO.txt

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+Developer's Certificate of Origin 1.1
+
+      By making a contribution to this project, I certify that:
+
+      (a) The contribution was created in whole or in part by me and I
+          have the right to submit it under the open source license
+          indicated in the file; or
+
+      (b) The contribution is based upon previous work that, to the best
+          of my knowledge, is covered under an appropriate open source
+          license and I have the right under that license to submit that
+          work with modifications, whether created in whole or in part
+          by me, under the same open source license (unless I am
+          permitted to submit under a different license), as indicated
+          in the file; or
+
+      (c) The contribution was provided directly to me by some other
+          person who certified (a), (b) or (c) and I have not modified
+          it.
+
+      (d) I understand and agree that this project and the contribution
+          are public and that a record of the contribution (including all
+          personal information I submit with it, including my sign-off) is
+          maintained indefinitely and may be redistributed consistent with
+          this project or the open source license(s) involved.

README.md

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+
+SMF 3.0
+Simple Machines Forum, www.simplemachines.org
+
+License: [BSD 3-clause license](http://www.opensource.org/licenses/BSD-3-Clause).
+Please see the license file for details.
+
+Included third party software is under their respective licenses.
+
+This repository will hold the rewriting of SMF 3.0.
+For the moment, it holds a few example files.
+They are to be implemented in personal repositories and merged here.
+
+######Notes:
+
+Feel free to fork this repository and make your desired changes.
+
+Please see the [Developer's Certificate of Origin](https://github.com/SimpleMachines/SMF3.0-module/blob/master/DCO.txt) in the repository:
+by signing off your contributions, you acknowledge that you can and do license your submissions under the license of the project.
+
+######How to contribute:
+* fork the repository. If you are not used to Github, please check out [fork a repository](http://help.github.com/fork-a-repo).
+* branch your repository, to commit the desired changes.
+* sign-off your commits, to acknowledge your submission under the license of the project.
+ * an easy way to do so, is to define an alias for the git commit command, which includes -s switch (reference: [How to create Git aliases](http://githacks.com/post/1168909216/how-to-create-git-aliases))
+* send a pull request to us.