Update widget.php to include full size image in the Image Size selection dropdown
update to split into logical classes

fixes #8
move images folder
updated to flexslider v2.2.2

Starts #7. CSS updates still need to happen to complete the ticket
fix typos and spacing
update filter names

changed filter names from 'acfs' to 'arconix_flexslider'. This is more
consistent with the naming convention used in the rest of my plugins

fixes #10
remove featured image requirement

in the query there was a meta key which required the post to have a
featured image in order to be returned.  This key prevented the use of
post types which didn't have featured images (like testimonials and
events) from displaying.

While that could always be overridden by the available filter, it should
not be the default behavior. Now if users want to only show items which
have a featured image, they add it back in via the
`arconix_flexslider_loop_args` filter.

See the gist here: https://gist.github.com/j-gardner/10437717

fixes #9
update inline docs

part of #1
restrict dashboard widget

only load it for users who can manage options (administrators) or can be
turned off completely by accessing the available filters

fixes #4
update image locations