Merge branch 'zsh-style-dirname' into 'master'

Use Zsh modifier instead of sub-shell dirname

See merge request allworldit/awit-zsh-superawesome!13

zshrc

 # Set the directory where we're being loaded from
-AZS_DIR=$(dirname "$0")
+AZS_DIR="$0:h"
+
+## Home bin path
 
 # Override first bin directory
 if [ -d "$HOME/.local/bin" ]