bashrc improvements for git

show which brach on
git auto complete

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;34m\]\u@\h\[\033[00m\]:\[\033[01;33m\]\t\[\033[ 00m\]:\[\033[01;32m\]\w\[\033[00m\]$(__git_ps1 " (%s)")\$ '


source /usr/local/etc/bash_completion.d/git-completion.bash