Fixed folder spelling error.

The submodule is called addthis_displays and the folder was called
addthis_display without the s at the and. Now the folder has the
correct name.

diff --git a/addthis_display/addthis_displays.addthis.inc b/addthis_displays/addthis_displays.addthis.inc
similarity index 100%
rename from addthis_display/addthis_displays.addthis.inc
rename to addthis_displays/addthis_displays.addthis.inc

diff --git a/addthis_display/addthis_displays.field.inc b/addthis_displays/addthis_displays.field.inc
similarity index 100%
rename from addthis_display/addthis_displays.field.inc
rename to addthis_displays/addthis_displays.field.inc

diff --git a/addthis_display/addthis_displays.info b/addthis_displays/addthis_displays.info
similarity index 100%
rename from addthis_display/addthis_displays.info
rename to addthis_displays/addthis_displays.info

diff --git a/addthis_display/addthis_displays.module b/addthis_displays/addthis_displays.module
similarity index 100%
rename from addthis_display/addthis_displays.module
rename to addthis_displays/addthis_displays.module