Merge pull request #73 from greenbell/rails-3-2

Backport #70 to rails-3-2 branch
Remove unnecessary focus option

Signed-off-by: Shin-ichiro OGAWA <rust.stnard+git@gmail.com>
iPhone mailer sends halfwidth-kana characters in ISO-2022-JP encoded mail

Conflicts:
	lib/jpmobile/util.rb