Update my configuration files

elisp/ess-setup.el

@@ -0,0 +1,10 @@
+;; better behavior inserting _
+(require ‘ess-smart-underscore)
+
+;; enable code auto completion
+(require 'auto-complete-config)
+(ac-config-default)
+(setq ac-auto-start nil)
+(define-key ac-mode-map (kbd "<f2>") 'auto-complete)
+(define-key ac-completing-map [return] nil)
+(setq ac-quick-help-delay 0.1)