Fix display bug

Previously, using the `posts_per_page` param didn't actually restrict
the number of FAQ's returned. This fixes #20 by removing the `nopaging`
param
fix version number
Update Return to Top description

The description of the checkbox has been updated to be clearer about the
behavior of the return to top link

fixes #18
Add shortcode param to skip group check

When the FAQ shortcode is processed, it checks for the existence of any
FAQ groups, if a user wants to shortcut that check and skip directly to
a full FAQ output (e.g. they want a list of recently added FAQs,
etc...), they can use the `skip_group` param and set that to `true`.

Fixes #21
fixed a bug with commit for #21
Add basic infrastructure for accordion setup
more work on the accordion script
Initial accordion dev complete

CSS needs tweaking
remove unnecessary css

I was going to load the smoothness jQuery UI theme locally but will opt
for Google's CDN instead.
fix a couple errors in the layout
various css improvements

added the accordion section and also cleaned up/improved some of the
interior padding and margin issues for the `<p>` tags.
allow filter overrides for jQuery UI script

allow the jQuery UI script to be filtered by individual argument or out
entirely
fix CSS accordion styling
change function name to be more descriptive
update files for v1.5.0 release
Fixes Title Display Bug

Previously all titles were accidently wrapped in a
`sanitize_html_class()` call which messed up the title display. This
fixes #22
update version info for 1.5.1 release
Fix an index error
Fix a typo in the Messages function
Fix display issue

Previously an extra `<div>` was being added after the conclusion of the
FAQ output. This was supposed to only apply when the user selected an
accordion-style display but no accordion check was added. This commit
fixes #23