Code Overhaul

I did a complete code overhaul on the entire plugin. I wrapped the main code into a class with static functions to keep the global namespace clean.

I also did an AJAX overhaul. Now the plugin only sends metadata and everything html-related is done on the clientside

I fixed slideDown followed by slideUp. This bugged me the most, so I redid how the dropdown is built and it's height is being calculated. So it only needs to slide down once it's done.

I also redesigned how the columns are being handled. CSS 3 has some neat properties for that, and now everyone can easily choose how many columns the want

And lastly I moved inline script and style to seperate file so they can be cached by plugins like W3 Total Cache

I've tested the code down to WP 3.8 ( because everything older than that should be updated anyways. ) and added on to the README.txt accordingly