Improving the performance

Issue Summary

Currently, displaying the vote buttons is hard on the server and on the browser because
1) each button makes 3+N calls to the server (1 for the javascript, 1 for the loader, 1 for the loader image and N for the CSS and JS in your drupal site)
2) the loader spinner freezes in browsers because of the load
3) using setTimeout creates a new javascript environment for each one created

Here is what I have figured out:
1) The N calls to the server can be reduced or removed by either : including manually in your button template your required JS and CSS files or inlining them. However, for the sake of simplicity and example I will leave it the way it is in the default templates
2) The spinner I will remove in my next release because it is not helpful
3) I have found a way to use setInterval which seems to improve things a little (but needs confirmation). Unfortunatly, there is no other way to order the button display calls to the server.

I am trying to figure out a way by manipulating the IFRAME in javascript and by grouping all calls in a single call after the page has loaded but hits is proving extremely complicated and I have little time :(

I made a small test page with 6 buttons.
- Using the default button as is, I was getting over 142 requests downloading 830Kb of data in 11s
- By including on the CSS and JS for extra_voting_forms, I am down to 42 requests and 250KB of data in 6.69s

I think I'll just inline my CSS & JS...