! update combine class to deal with relative webfonts location

Signed-off-by: Spuds <spuds@spudsdesign.com>
! seems the data-icon values should in in ;

Signed-off-by: Spuds <spuds@spudsdesign.com>
Merge pull request #1275 from Spuds/compfix

Updates to the compressor to work with relative font files