Add clang and clojure configuration

20clang.el

@@ -0,0 +1,16 @@
+(defun activate-clang-mode ()
+  "Goodies for editing c files"
+  (set-indent 4)
+  (column-enforce-n 80)
+
+  (add-to-list (make-local-variable 'company-backends)
+               '(company-etags company-yasnippet))
+
+  (setq-local
+   ctags-refresh-command
+   (format
+    "ctags -e -R --languages=C -f %sTAGS %s."
+    (projectile-project-root) (projectile-project-root)
+  )))
+
+(add-hook 'c-mode-hook 'activate-clang-mode)