Use Ace Libraries where possible

[Sevin777]

There is a lot of functionality that is using custom functions that can be replaced by Ace's built in libs. Examples:

• escape html in ace/lib/lang

exports.escapeHTML = function(str) {
    return str.replace(/&/g, "&#38;").replace(/"/g, "&#34;").replace(/'/g, "&#39;").replace(/</g, "&#60;");
};

• dom lib