Add https://github.com/esri/contributing link.

CONTRIBUTING.md

@@ -1,3 +1,6 @@
+Esri welcomes contributions from anyone and everyone. Please see our
+[guidelines for contributing](https://github.com/esri/contributing).
+
 # Contributing to ArcGIS Viewer for Flex
 
 There are many ways you can contribute to the [ArcGIS Viewer for Flex](http://links.esri.com/flexviewer).
@@ -26,12 +29,11 @@ The [ArcGIS Viewer for Flex](http://links.esri.com/flexviewer) is built by the F
 7. Test your code.
 
 ### Submitting changes
-1. Read the License section below.
-2. Push the changes in your feature branch to your repo.
-3. Submit a [pull request](https://help.github.com/articles/using-pull-requests) against the "develop" branch.  Submitting a pull request will open a GitHub issue.
+1. Push the changes in your feature branch to your repo.
+2. Submit a [pull request](https://help.github.com/articles/using-pull-requests) against the "develop" branch.  Submitting a pull request will open a GitHub issue.
     * Clearly describe the issue including steps to reproduce; or if an enhancement, indicate the functionality you built.
 
 ## License
 By contributing your code, you agree to license your contribution under the terms of the [Apache License 2.0](https://github.com/Esri/arcgis-viewer-flex/blob/master/license.txt).  See item 5 of [https://github.com/Esri/arcgis-viewer-flex/blob/master/license.txt](https://github.com/Esri/arcgis-viewer-flex/blob/master/license.txt) for more details.
 
-[1]: https://github.com/Esri/arcgis-viewer-flex/wiki/Coding-Conventions
+[1]: https://github.com/Esri/arcgis-viewer-flex/wiki/Coding-Conventions