git hub command line improvements

github_cli.bash

Improve the log (https://coderwall.com/p/euwpig?i=3&p=1&t=git)

git config --global alias.lg "log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --"

Enable color in git:
git config --global --add color.ui true

Make git push only push the current branch
git config --global push.default current

# or using "simple", apparently becoming default
git config --global push.default simple