Updated Developer notes (markdown)

Developer-notes.md

@@ -14,19 +14,19 @@ This is a step-by-step guide to keep your forked copy of Cxbx-Reloaded updated,
 If you want more informations about git commands, you can read this free book: https://git-scm.com/book/en/v2
 Special thanks to @PatrickvL and @RadWolfie.
 
-# First time setup (aka adding the upstream remote)
+### First time setup (aka adding the upstream remote)
 You have to follow these steps only the firt time you fork Cxbx-Reloaded:
 1) Fork mainline Cxbx-Reloaded repository on GitHub by clicking the "Fork" button (upper-right) and clone it to your hard drive.
 2) Open a git shell in the root directory of your cloned repo and paste this command (without quotes): "git remote add upstream https://github.com/Cxbx-Reloaded/Cxbx-Reloaded.git".
 3) Now type (without quotes) "git remote -v". If you see two "origin" and two "upstream": congratulation, you have completed the first time setup.
 
-# Keep your fork updated
+### Keep your fork updated
 You have to follow these steps anytime you want to update your forked Cxbx-Reloaded repo:
 1) Open a git shell in the root directory of your cloned repo and paste these commands (without quotes): "git fetch upstream" and then "git checkout master".
 2) Now type (without quotes): "git rebase -i upstream/master" and check if every commit looks good.
 3) You may need to run (without quotes): "git push origin master --force" to update your repo on GitHub.
 
-# Create a branch for your new contribution
+### Create a branch for your new contribution
 You should keep the master branch of your forked repo clean, and instead create a new branch for every contributions you want to send.
 Before creating a branch MAKE SURE THAT YOUR FORK IS UP-TO-DATE!
 Please change "name_of_new_branch" with something meaningfull like "fixing-issue-X".