Current Git branch name in command prompt
@see: http://martinvalasek.com/blog/current-git-branch-name-in-command-prompt
set allow override all directive for /var/www in /etc/apache2/sites-enabled/000-default

@see:
http://serverfault.com/questions/95976/programatically-change-allowoverride-for-directory-var-www
http://stackoverflow.com/questions/16529716/awk-save-modifications-inplace
remove if-condition
add something nice to /home/vagrant/.profile