Rakefile: Create backup and temp folders.

.gitignore

@@ -0,0 +1,3 @@
+# ViM files
+_backup
+_temp

Rakefile

@@ -1,3 +1,14 @@
+module Janus
+  module VIM
+    extend self
+
+    # Folders
+    def folders
+      %w[ _backup _temp ]
+    end
+  end
+end
+
 def expand(file)
   File.expand_path(file)
 end
@@ -10,6 +21,13 @@ task expand("~/.gvimrc") => "gvimrc" do
   sh "ln -s ~/.vim/gvimrc ~/.gvimrc"
 end
 
+desc "Create necessary folders."
+task :folders do
+  Janus::VIM.folders.each do |folder|
+    mkdir_p folder
+  end
+end
+
 task :update do
   sh "git pull"
   sh "git submodule init"