added highlight-indentation mode and configured specific modes for it

languages/coffee-script.el

@@ -6,4 +6,7 @@
             (flyspell-prog-mode)
             (linum-mode t)
             (fci-mode)
-            (setq tab-width 2)))
+            (setq tab-width 2)
+            (setq highlight-indentation-offset 2)
+            (highlight-indentation-mode)
+            (highlight-indentation-current-column-mode)))

languages/python.el

@@ -3,4 +3,6 @@
             (flyspell-prog-mode)
             (linum-mode t)
             (fci-mode)
+            (highlight-indentation-mode)
+            (highlight-indentation-current-column-mode)
             (define-key python-mode-map (kbd "RET") 'newline-and-indent)))

languages/ruby.el

@@ -23,6 +23,8 @@
               (add-to-list 'ac-sources 'ac-source-rsense-method)
               (add-to-list 'ac-sources 'ac-source-rsense-constant))
             (flymake-ruby-load)
+            (highlight-indentation-mode)
+            (highlight-indentation-current-column-mode)
             (ruby-electric-mode t)
             (setq ruby-deep-arglist t)
             (setq ruby-deep-indent-paren nil)

languages/shell-script.el

@@ -2,4 +2,6 @@
           (lambda ()
             (flyspell-prog-mode)
             (linum-mode t)
-            (fci-mode)))
+            (fci-mode)
+            (highlight-indentation-mode)
+            (highlight-indentation-current-column-mode)))

languages/yaml.el

@@ -7,4 +7,7 @@
              (flyspell-prog-mode)
              (linum-mode t)
              (fci-mode)
+             (setq highlight-indentation-offset 2)
+             (highlight-indentation-mode)
+             (highlight-indentation-current-column-mode)
              (define-key yaml-mode-map (kbd "RET") 'newline-and-indent)))

packages.el

@@ -122,6 +122,7 @@
          evil
          full-ack
          git-blame
+         highlight-indentation
          inf-ruby
          markdown-mode
          php-mode-improved