GitHub quick start howto

The vastness of GitHub has always been daunting, so now that I wanted to contribute to NetHunter (well... as much as I can really!) it was time to slay that dragon (thankfully I did not have to do it on my own!)

• First make an account in GitHub
• On your terminal type to configure your global username and email
  git config --global user.name "<usrname>"
  git config --global user.email "<youremail>"
• You can cahe your credentials locally so you dont have to enter them every time (1h)
  git config --global credential.helper cache
  git config --global credential.helper 'cache --timeout=3600'
• Go to the nethunter-github and click the fork button to copy everything to your own account.
• Create a basic skeleton and download everything
  mkdir ~/arm-stuff
  cd ~/arm-stuff
  git clone https://github.com/<username>/kali-nethunter.git
  cd ~/arm-stuff/kali-nethunter
• Configure the upstrem source so the refreshes come from the original repo instead of your own
  git remote -v
  git remote add upstream https://github.com/offensive-security/kali-nethunter.git
• Refresh from the original
  git fetch upstream
  git checkout master
  git merge upstream/master
• Make your changes
• Add your changes to your local index
  git add flash/system/xbin/*something*
  git commit -m "Addition for something"
• Push to your account's master repo
  git push origin master
  Username for 'https://github.com': <username>
  Password for 'https://<username>@github.com': <password>
• Go to GitHub and create a pull request
  https://github.com/<username>/kali-nethunter/pull/new/master

References:
https://help.github.com/articles/fork-a-repo/
https://help.github.com/articles/using-pull-requests/
http://rogerdudler.github.io/git-guide/

Many thanks to binkybear and Photonicgeek for their help :)