Delete .vimrc file

Moving to <https://gist.github.com/co-me/8034687>
Add new .vimrc file
gitignore: Add new ignored files
gitignore: Change notation
emacs: Remove needless settings mainly for grep
emacs: Rename a setting file for searching

grep is no longer used in this setting.

07_grep.el ->
07_ag.el
emacs: Remove an include line