Added a couple of options

Hi,

I liked your plugin but I added a couple of tweaks to make it work better with my usage. Thought you might want to merge them into the main branch for a little extra configurability. The 2 options are:

1. Load JS in footer - I like to load all my JS is the footer, so I added this option into your plugin

2. Disable the CSS stylesheet - I wanted to use my theme's stylesheet instead of the plugin's