Update proposal template

proposal-template.md

@@ -1,5 +1,3 @@
-Use this template to submit your proposal to the [Google Summer of Code site](http://www.google-melange.com/gsoc/homepage/google/gsoc2015). Applications can be submitted between March 16 - 27, but should be submitted as early as possible so we can provide feedback on your proposal.
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 # Application Proposal template
 
 1. Who are you? We need your name, and how to contact you! (email, etc.)
@@ -8,4 +6,6 @@ Use this template to submit your proposal to the [Google Summer of Code site](ht
 
 3. How are you going to do it? Tell us how you are going to accomplish your proposal, including a detailed work timeline that breaks the project into one or two week milestones. Convince us that you’ve thought this through, and have an idea of how to proceed.
 
-4. Why you? Link to any examples of past work, such as patches to OSS projects, GitHub (or other code hosting sites) repositories, etc, so we can better evaluate your skills. 
+4. Why you? Link to any examples of past work, such as patches to OSS projects, GitHub (or other code hosting sites) repositories, etc, so we can better evaluate your skills.
+
+GitHub is actively seeking to diversify our contributors and especially welcome applications from women from all backgrounds and people of color.