UI Changes

The chat shortcode has been reworked. Rather than appearing as
paragraphs, the UI elements have been sorted into tabs that are hidden
by default and toggled by buttons.

IDs have been added+changed to accomodate this.

Button and input styling have been abstracted slightly. I am considering
moving these styles further out, to my blog CSS.

Integrating latest version of gallery/image shortcodes

Adding live chat page