refactor(emacs): update folder structure to move melpa out of the repo

When I was linking the whole .emacs.d directory all of the junk that gets put
into that directory was getting put into the dotfiles repo and accessible by
puppet. This was slowing things down quite alot. Now I am only linking the
directories I need into the .emacs.d

site-modules/core/manifests/emacs.pp

@@ -1,6 +1,20 @@
 class core::emacs {
   file { "${user_home}/.emacs.d":
+    ensure => 'directory',
+  }
+
+  file { "${user_home}/.emacs.d/src":
     ensure => 'link',
-    target => find_file('core/emacs'),
+    target => find_file('core/emacs/src'),
+  }
+
+  file { "${user_home}/.emacs.d/snippets":
+    ensure => 'link',
+    target => find_file('core/emacs/snippets'),
+  }
+
+  file { "${user_home}/.emacs.d/init.el":
+    ensure => 'link',
+    target => find_file('core/emacs/init.el'),
   }
 }