contrib: add csstidy package
contrib: add csstidy package

Package a fork of the CSSTidy C++ implementation for CSS minification
use in a later commit.

Signed-off-by: Jo-Philipp Wich <bd73d35759d75cc215150d1bbc94f1b1078bee01@mein.io>

lbthomsen/openwrt-luci,rogerpueyo/luci,openwrt-es/openwrt-luci,rogerpueyo/luci,hnyman/luci,artynet/luci,openwrt-es/openwrt-luci,tobiaswaldvogel/luci,artynet/luci,Noltari/luci,artynet/luci,Noltari/luci,tobiaswaldvogel/luci,artynet/luci,openwrt-es/openwrt-luci,rogerpueyo/luci,tobiaswaldvogel/luci,Noltari/luci,lbthomsen/openwrt-luci,artynet/luci,rogerpueyo/luci,artynet/luci,Noltari/luci,openwrt-es/openwrt-luci,hnyman/luci,tobiaswaldvogel/luci,Noltari/luci,hnyman/luci,tobiaswaldvogel/luci,rogerpueyo/luci,tobiaswaldvogel/luci,openwrt-es/openwrt-luci,lbthomsen/openwrt-luci,openwrt/luci,nmav/luci,openwrt-es/openwrt-luci,Noltari/luci,rogerpueyo/luci,nmav/luci,tobiaswaldvogel/luci,openwrt/luci,artynet/luci,hnyman/luci,lbthomsen/openwrt-luci,nmav/luci,Noltari/luci,hnyman/luci,artynet/luci,openwrt/luci,Noltari/luci,openwrt/luci,openwrt/luci,rogerpueyo/luci,lbthomsen/openwrt-luci,artynet/luci,lbthomsen/openwrt-luci,nmav/luci,tobiaswaldvogel/luci,lbthomsen/openwrt-luci,openwrt/luci,nmav/luci,lbthomsen/openwrt-luci,hnyman/luci,Noltari/luci,openwrt/luci,nmav/luci,hnyman/luci,rogerpueyo/luci,nmav/luci,nmav/luci,openwrt/luci,hnyman/luci,openwrt-es/openwrt-luci,openwrt-es/openwrt-luci,nmav/luci