Makes Fontello's "Edit Codes" start at the beginning-ish of the PUA

getPuaUnicode.js

// Referencing http://en.wikibooks.org/wiki/Unicode/Character_reference/E000-EFFF
var getPuaUnicode = (function() {
    var PUA = [];

    var get0toF = function(i) {
        return "0123456789abcdef"[i];
    };

    for (var i = 0; i <= 15; i++) {
        for (var ii = 0; ii <= 15; ii++) {
            for (var iii = 0; iii <= 15; iii++) {
                PUA.push("e" + get0toF(i) + get0toF(ii) + get0toF(iii));
            }
        }
    }

    return function(i) {
        return PUA[i];
    }
}());

// And then run this in Fontello > Customize Codes
(function() {
    var count = 0,
        offset = 100; // avoids mapping over Apple emoji

    $(".result-glyph").find("[data-bind='value: customHex']").each(function(i) {
        $(this).val(getPuaUnicode(offset + i)).trigger("change");
        count++;
    });

    alert("Done, thanks. Changed " + count + " codes.");
}());

PUA: http://en.wikipedia.org/wiki/Mapping_of_Unicode_characters#Private_use_characters