switch to antigen-hs for zsh plugins for speed up
and only source necessary files from the omz lib

Before with antigen (without sourcing anything from omz),
average elapsed time testing with '/usr/bin/time zsh -i -c exit' was 0.82.
Without antigen, it was usually around 0.07.
Now with antigen-hs, it's usually around 0.09.
export xdg_config_home in ~/.profile
add notifcations for mpd song changes
add zbell.sh for notification on long command end
don't source navigation.penta on LocationChange
build tab number check into bindings instead