Merge branch 'master' of https://github.com/mgi166/dotfiles
* Add new elisp 'point-undo'
* unnecessary function removed
* Set font configures
* mac-key-mode conditional branch modified
   * when emacs version 23, window-system is 'ns
   * it is unnecesary conditional branch
* Add new function 'yel-yank'
   * it is experimental
* Modify migemo-command an argument
   * specify expand-path cmigemo