Update templates for issue and pull request (#75)

Author: kazuhitoyokoi

.github/ISSUE_TEMPLATE.md

@@ -1,4 +1,23 @@
+<!--
+## Before you hit that Submit button....
+
+This issue tracker is for problems with the Node generator.
+
+If your issue is:
+  - a general 'how-to' type question,
+  - a feature request or suggestion for a change,
+  - or problems with 3rd party (`node-red-contrib-`) nodes
+
+please use the [Node-RED Forum](https://discourse.nodered.org) or [slack team](https://nodered.org/slack).
+
+You could also consider asking a question on [Stack Overflow](https://stackoverflow.com/questions/tagged/node-red) and tag it `node-red`.
+
+That way the whole Node-RED user community can help, rather than rely on the core development team.
+
+## So you have a real issue to raise...
+
 To help us understand the issue, please fill-in as much of the following information as you can:
+-->
 
 ### What are the steps to reproduce?
 
@@ -8,6 +27,7 @@ To help us understand the issue, please fill-in as much of the following informa
 
 ### Please tell us about your environment:
 
+- [ ] Node generator version:
 - [ ] Node-RED version:
 - [ ] node.js version:
 - [ ] npm version:

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,20 +1,34 @@
+<!--
+## Before you hit that Submit button....
+
+Please read our [contribution guidelines](https://github.com/node-red/node-red/blob/master/CONTRIBUTING.md)
+before submitting a pull-request.
+
 ## Types of changes
 
 What types of changes does your code introduce?
-_Put an `x` in the boxes that apply_
+Put an `x` in the boxes that apply
+-->
 
 - [ ] Bugfix (non-breaking change which fixes an issue)
 - [ ] New feature (non-breaking change which adds functionality)
 
+<!--
+If you want to raise a pull-request with a new feature, or a refactoring
+of existing code, it **may well get rejected** if it hasn't been discussed on
+the [forum](https://discourse.nodered.org) or
+[slack team](https://nodered.org/slack) first.
+
+-->
+
 ## Proposed changes
 
-Describe the nature of this change. What problem does it address?
+<!-- Describe the nature of this change. What problem does it address? -->
 
 ## Checklist
-_Put an `x` in the boxes that apply_
+<!-- Put an `x` in the boxes that apply -->
 
 - [ ] I have read the [contribution guidelines](https://github.com/node-red/node-red/blob/master/CONTRIBUTING.md)
 - [ ] For non-bugfix PRs, I have discussed this change on the mailing list/slack team.
 - [ ] I have run `grunt` to verify the unit tests pass
 - [ ] I have added suitable unit tests to cover the new/changed functionality
-