add bordercolor in style options and enable deepcopy of options
added test for bordercolor
allow newer versions of colors to be used

later versions of colors allow switching off escape codes like:

    if (!process.stdout.isTTY) {
        colors.mode = 'none';
    }
Merge pull request #22 from isao/master

allow newer versions of colors to be used
Merge pull request #20 from thomd/bordercolor

color styling of table border
Merge remote-tracking branch 'upstream/master'
changed screenshot