Update admin/es-ES.com_hwdmediashare.ini

Updated the language file. 
I think here miss some string i look for "COM_HWDMS_MEDIA_AUTOPLAY_LABEL" 
in the spanish language an English but is not presented
other are: 
COM_HWDMS_SHOW_CATEGORY_MEDIA_POPUP_LABEL
COM_HWDMS_TOOLTIP_LOCATION_LABEL
COM_HWDMS_TOOLTIP_CONTENTS_LABEL
COM_HWDMS_OPTION_TITLE_ONLY
COM_HWDMS_OPTION_TITLE_AND_DESCRIPTION
I look for more but i think that is all.
Thanks for all.
Merge pull request #37 from Hertak/patch-10

Update admin/es-ES.com_hwdmediashare.ini