Change setup.sh to bash, fix auto-chmod, update vim-plug

Setup script is set to use a bash executable, as some distributions
invoke alternative shells that do no support `'-o pipefail'` e.g.
Debian/Ubuntu symlinks `sh` to `dash`.

Vim shell commands (e.g. !chmod) stop pipe from being an effective vim
command separator as it gets send to the shell command as an argument.

setup.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -euo pipefail
 IFS=$'\n\t'
 

vim/autoload/plug.vim

@@ -399,7 +399,7 @@ function! s:lod(names, types)
 endfunction
 
 function! s:lod_ft(pat, names)
-  call s:lod(a:names, ['plugin', 'after/plugin'])
+  call s:lod(a:names, ['plugin', 'after/plugin', 'syntax', 'after/syntax'])
   execute 'autocmd! PlugLOD FileType' a:pat
   if exists('#filetypeplugin#FileType')
     doautocmd filetypeplugin FileType

vim/settings/templates.vim

@@ -3,4 +3,4 @@
 autocmd BufNewFile *.sh 0r ~/dotfiles/vim/templates/bashscript | 2,$ g/^#/d | normal G
 
 " Make shell scripts executable on save.
-autocmd BufWritePost *.sh if getline(1) =~ "^#!/bin/" | silent !chmod +x <afile> | endif
+autocmd BufWritePost *.sh if getline(1) =~ "^#!/bin/" | silent !chmod +x <afile>