Text encoder ignoring colorize option of false

[bradhowes]

I was unable to get a new lumber.encoders.Text to honor a 'colorize' setting of false. I believe the code that sets the colorize option is incorrect:

self.colorize = options.colorize || true;

I've instead patched the Text constructor to do this:

function valid_option(value, def) {
    return (typeof value === "undefined") ? def : value;
}

self.colorize = valid_option(options.colorize, true);
self.timestamp = valid_option(options.timestamp, false);
self.headFormat = valid_option(options.headFormat, '%l: ');
self.dateFormat = valid_option(options.dateFormat, 'isoDateTime');

[englercj]

Good catch, I will fix this in the next couple days after I finish up some other work.