add .extras to gitignore, add .path
add install.sh to install dependencies, add z init to bash_profile
remove json() function
Merge branch 'master' of github.com:mdulghier/dotfiles

* 'master' of github.com:mdulghier/dotfiles:
  add .ubuntu for ubuntu initialization, adapt sublime settings
  add email and name to gitconfig
  add ll as alias to la
simplify prompt