Merge pull request #71 from nikomatsakis/cfp

proposed "call for participation" template

Author: nikomatsakis

procedures/call-for-participation.md

@@ -0,0 +1,23 @@
+# Call for participation
+
+One way to get help with a project is to issue a **call for
+participation** on the dedicated internals thread.
+
+Such calls should follow this (very simple) template, so as to help
+clarify what's going on:
+
+```
+- **Title:** Investigate #123141
+- **Experience level expected:** (Newcomer | Contributor | Experienced)
+- **Urgency:** (ASAP | over next few months | whenever)
+- **Contact:** @your-name-here in [the #your-stream-here stream on Zulip][z]
+
+[z]: https://rust-lang.zulipchat.com/
+
+Longer description goes here.
+```
+
+You should feel free to substitute other text for Experience Level
+Expected and Urgency, but the idea is to convey our expectations to
+people. In particular, the Urgency field is supposed to indicate how
+*quickly* people would need to work on this.