Update dosomething repo

update.sh

git checkout dev;
git fetch upstream;
git rebase upstream/dev;
git push origin dev;

NewBranch () {
  read -p "Do you wish to checkout a new branch? " yn
  case $yn in
    [Yy]* ) echo "Type in the issue #"; read issue_number; git checkout -b $issue_number; break;;
    [Nn]* ) ExistingBranch; break;;
    * ) echo "Y or N";;
  esac
}

ExistingBranch () {
  read -p "Do you wish to checkout an existing branch? " yn
  case $yn in
    [Yy]* ) echo "Type in the issue #"; read issue_number; git checkout $issue_number; break;;
    [Nn]* ) exit;;
    * ) echo "Y or N";;
  esac
}

NewBranch;
echo "Mission complete"