WrapText.cs

    string WrapText(string textToWrap, float width)
    {
        string returnText = "";
        string line = "";
        int lastSpace = 0;
        for (int i = 0; i < textToWrap.Length; i++)
        {
            if (line.Length == 0 && textToWrap[i] == ' ')
                continue;

            line += textToWrap[i];
            if (line[line.Length-1] == ' ')
                lastSpace = line.Length-1;

            textMesh.text = line;
            //Debug.Log("width: " + textMesh.renderer.bounds.extents.x);
            if (textMesh.renderer.bounds.extents.x * textMesh.transform.lossyScale.x > width)
            {
                string leftOver = line.Substring (lastSpace+1, line.Length - (lastSpace+1));
                line = line.Substring(0, lastSpace);
                returnText += line + "\n";
                line = leftOver;
                lastSpace = 0;
            }
        }

        if (line != "")
            returnText += line + "\n";
        textMesh.text = "";

        return returnText;
    }