Change font cache rebuild to use cache locking and to always update the font.css file in the library but only drop display cache if the MD5 has changed. xibosignage/xibo#1587
Change font cache rebuild to use cache locking and to always update the font.css file in the library but
only drop display cache if the MD5 has changed.
xibosignage/xibo#1587

PeterMis/xibo-cms,PeterMis/xibo-cms,PeterMis/xibo-cms,alexharrington/xibo-cms,xibosignage/xibo-cms,alexharrington/xibo-cms,dasgarner/xibo-cms,alexharrington/xibo-cms,PeterMis/xibo-cms,PeterMis/xibo-cms,xibosignage/xibo-cms,xibosignage/xibo-cms,xibosignage/xibo-cms,xibosignage/xibo-cms,alexharrington/xibo-cms,dasgarner/xibo-cms,dasgarner/xibo-cms,dasgarner/xibo-cms,dasgarner/xibo-cms,xibosignage/xibo-cms,alexharrington/xibo-cms,dasgarner/xibo-cms