Conditionally load the plugin styles and scripts

[titodevera]

• Stop enqueuing the plugin styles and scripts on every page.
• Removes unnecessary "is_admin()" check and "wp_enqueue_script( 'jquery' )"
• Shorthand for "$( document ).ready"

☕️:bowtie:

[matt-h]

Thanks for this. The enqueue part looks good.

The $( document ).ready change actually didn't run it on ready anymore. I think it needed to start with jQuery to do so, but I think it is fine in the longhand form as is.

I pulled your changes into a new pull request with a little bit of formatting changes.
#59