Created How to properly submit a PR (markdown)

How-to-properly-submit-a-PR.md

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+# Managing a Forked Branch
+
+If you plan to submit a PR bigger than a simple change in one file, here is a short intro about how to do a clean PR.
+
+*     fork the WLED repository in Github
+*     `git clone https://github.com/<github_user>/WLED.git` and work on your local copy
+*     `git remote add upstream https://github.com/Aircoookie/WLED.git`
+*     `git checkout master`
+*     `git checkout -b <temp_branch>` to create a working branch where you can push commits
+*     `git push --set-upstream origin <temp_branch>`
+*     work on your local version and push as many commits as you want
+
+When you think it is ready to merge and submit a PR:
+
+*     `git checkout master` to go back to the main branch
+*     `git pull upstream master` to update all the latest changes
+*     `git push` to update your fork
+*     `git checkout -b <pr_branch>` to create a new branch for the final PR
+*     `git push --set-upstream origin <pr_branch>`
+*     Merge the edits but be sure to remove the history of your local commits
+*     `git merge --squash <temp_branch>`
+*     `git commit -m "Message"`
+
+Now you have a clean single commit from which you can create the PR on the WLED Github