I am come back with a new information for you.
If you want add a Twitter share button/links in your website then please just copy and paste my code in your files where you want add this, you have no need to add/include other external CSS or JS files.
<a onclick="window.open('https://twitter.com/?status=ENTER YOUR TWEET CONTENT HERE', '_blank', 'width=ENTER-WINDOW-WIDTH HERE,height=ENTER-WINDOW-HEIGHT HERE')"></a>
If you feel that this is very usable information for you then want from you that please give some freelance work, so i will do something best only for you.
Please Like & Share my blog on facebook https://www.facebook.com/aboutraghunath