Changes to get HTML5 target to build and run
Offside font wasn't building in html5 target:
    Called from ? line 1
    Called from be/haxer/hxswfml/Main.hx line 242
    Called from be/haxer/hxswfml/FontWriter.hx line 317
    Called from be/haxer/hxswfml/FontWriter.hx line 790
    Called from be/haxer/hxswfml/FontWriter.hx line 808
    Uncaught exception - Invalid field access : x