feat(docs): Inform users/developers of the canary branch

Changes:
- Update readme.md
- Update contributing.md

Author: kingcody

Diff for: contributing.md

@@ -4,6 +4,7 @@ See the [contributing docs](https://github.com/yeoman/yeoman/blob/master/contrib
 
 Additionally for this generator:
 
+* Please submit PRs to the `canary` branch, it is the main development branch for this generator.
 * When submitting an issue, please follow the [guidelines](https://github.com/yeoman/yeoman/blob/master/contributing.md#issue-submission). Especially important is to make sure Yeoman is up-to-date, and providing the command or commands that cause the issue.
 * When submitting a PR, make sure that the commit messages match the [AngularJS conventions][commit-message-format] (see below).
 * When submitting a bugfix, write a test that exposes the bug and fails before applying your fix. Submit the test alongside the fix.

Diff for: readme.md

@@ -384,6 +384,10 @@ An example server component in `server/api`
 
 See the [contributing docs](https://github.com/DaftMonk/generator-angular-fullstack/blob/master/contributing.md)
 
+This project has 2 main branches: `master` and `canary`. The `master` branch is where the current stable code lives and should be used for production setups. The `canary` branch is the main development branch, this is where PRs should be submitted to (backport fixes may be applied to `master`).
+
+By seperating the current stable code from the cutting-edge development we hope to provide a stable and efficient workflow for users and developers alike.
+
 When submitting an issue, please follow the [guidelines](https://github.com/yeoman/yeoman/blob/master/contributing.md#issue-submission). Especially important is to make sure Yeoman is up-to-date, and providing the command or commands that cause the issue.
 
 When submitting a PR, make sure that the commit messages match the [AngularJS conventions](https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/).