Initial release docs update.

.github/PULL_REQUEST_TEMPLATE

@@ -1,14 +1,22 @@
+## Scope and purpose
+
+Add a few words about why this PR is needed and what is its scope.
+
+Add mentions of things that are not covered here and are planed to be done
+in separate PRs.
+
+
 ## Remove this section
 
 Please have a look at [our developer documentation](https://twistedmatrix.com/trac/wiki/TwistedDevelopment#SubmittingaPatch) before submitting your Pull Request.
 
 Please note that the trac ticket, news fragment, and review submission portions of this process apply to *all* pull requests, no matter how small; if you don't do them, it's likely that nobody will even notice your PR needs a review.
 
+
 ## Contributor Checklist:
 
 * [ ] The associated ticket in Trac is here: https://twistedmatrix.com/trac/ticket/<!-- Create a new one at https://twistedmatrix.com/trac/newticket and replace this comment with the ticket number. -->
 * [ ] I ran `tox -e lint` to format my patch to meet the [Twisted Coding Standard](https://twistedmatrix.com/documents/current/core/development/policy/coding-standard.html)
-* [ ] I ran additional checks listed at [Getting Your Patch Accepted](https://twistedmatrix.com/trac/wiki/TwistedDevelopment#GettingYourPatchAccepted)
 * [ ] I have created a newsfragment in src/twisted/newsfragments/ (see: [News files](https://twistedmatrix.com/trac/wiki/ReviewProcess#Newsfiles))
 * [ ] I have updated the automated tests.
 * [ ] I have submitted the associated Trac ticket for review by adding the word `review` to the keywords field in Trac, and putting a link to this PR in the comment; it shows up in https://twisted.reviews/ now.