Remove snippets dependency; add 'make snippets'

.gitignore

@@ -1,6 +1,7 @@
 .cask/
 eshell/
 private/cache/
+private/snippets/
 var/
 core/autoloads.el
 .mc-lists.el

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "private/snippets"]
-	path = private/snippets
-	url = git://github.com/hlissner/emacs-snippets.git

Makefile

@@ -13,6 +13,9 @@ update: autoloads
 
 clean: clean-files clean-elc
 
+snippets:
+	[ -d private/snippets ] || git clone https://github.com/hlissner/emacs-snippets private/snippets
+
 autoloads:
 	@echo "Generating autoloads"
 	@$(EMACS) --script scripts/generate-autoloads.el 2>&1 | sed 's/^/  /'