Added some translations and fixed mistranslated string.

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

Signed-off-by: Oliver Middleton <olliemail27@gmail.com>

 * Rename subdirectories to their repective OpenWrt package names
 * Make each LuCI module its own standalone package
 * Deploy a shared luci.mk which is used by each module Makefile

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>