Add condition before adding load path to el-get

When launch emacs at first time, el-get directory is not exist.
Then abort to load init.el.
Install japanese-holidays using el-get.

New japanese-holidays repository is github.
japanese-holidays was applied to new emacs version.
Add sticky_key.el
Delete to set magit-emacsclient-excutable

New version emacs is unnecessary.
Apply migemo for marvericks

* Fix hang up migemo isearch
  http://d.hatena.ne.jp/higepon/20060626/1151327464
Add load path to elisp/*
Load setting of rbenv before load el-get

rbenv-installation-dir is not path of boxen rbenv.
(default is ~/.rbenv)
Then, can not install rbenv-el by el-get.
Add exec-path-from-shell
Delete setting of w3m-command

Perhaps, is no longer needed be to use exec-path-from-shell.