Fix Vim plugin submodules to resolve after fresh clone

.gitignore

@@ -0,0 +1 @@
+/vim

README

@@ -14,10 +14,8 @@ location that's inside of $PATH
 
 Vim plugins are version controlled using submodules
 To add a new plugin run: 
-git submodule add <plugin repo> <this repo>/vim/.vim/pack/<key>/[start | opt]/<plugin name>
+git submodule add <plugin repo> ./vim/.vim/pack/<key>/[start | opt]/<plugin name>
+After running git submodule add, commit changes to .gitmodules
 
 On a fresh clone of the dotfiles, to install Vim plugins run:
-git submodule init
-Followed by
-git submodule update
-
+./get-submodules.sh

get-submodules.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
+    while read path_key path
+    do
+        url_key=$(echo $path_key | sed 's/\.path/.url/')
+        url=$(git config -f .gitmodules --get "$url_key")
+        git submodule add $url $path
+    done