Add command to 'push jump'

* New function: `pj`
Resolves path with `j` (`z`) and pushes it with `pushd`.

zsh/.zshrc

···
   scrot $@ /tmp/scrotclip.png -e 'xclip -se c -t image/png -i $f && rm $f'
 }
 
+pj() {
+  pushd "$(j -e $@)"
+}
+
 # WTF, Ansible?
 export ANSIBLE_NOCOWS=1