ADD: apt package for vim tagbar

Makefile

 all: install setup
 
 install:
-	sudo apt-get install git tree dialog curl tmux rsync \
+	sudo apt-get install git tree dialog ctags curl tmux rsync \
 		neovim python-neovim python3-neovim 
 	curl -fLo ~/.local/share/nvim/site/autoload/plug.vim --create-dirs \
 		https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim