screenの設定ファイルを追加.
 On branch master
	new file:   .screen/all.layout
	new file:   .screen/default.layout
	new file:   .screen/dev.layout
	new file:   .screen/only.layout
	new file:   .screen/opt.layout
	new file:   .screenrc
 bashエイリアスを追加.
 On branch master
	modified:   .bash_aliases