Updating the main readme for work toward 3.0. A more complete readme should be created before 3.0.

Author: tschaub

readme.md

@@ -0,0 +1,25 @@
+# OpenLayers 3
+
+This document describes a bit about the working going toward OpenLayers 3.0.
+
+OpenLayers v3 development is taking place in git, with a central repository
+hosted on [GitHub][1].  To contribute to development, it's important to be 
+comfortable working with git.  The [help pages][2] on GitHub provide a nice 
+starting place for this.
+
+The repository contains a master branch and a 2.x branch.  Other branches may 
+come and go as people work on specific features.  The master branch should be 
+the closest stable thing to OpenLayers 3.0 (and this readme should get updated
+before 3.0 is released).  However, at any time before the 3.0 release, the 
+master branch should not be considered stable.  The 2.x branch is used to merge
+in changes from any ongoing development in the v2 line of development.
+
+If you are interested in contributing, please fork the central repository, make
+changes, and issue a pull request.  We may change the process along the way, but
+for now, developers with access to the subversion trunk will be able to push to
+the central git repository.  We welcome your contributions and thank you for 
+helping us work toward OpenLayers 3.
+
+
+[1]: https://github.com/openlayers/openlayers
+[2]: http://help.github.com/