Syntax
[bw_tides
tideurl="http://www.tidetimes.org.uk/chichester-harbour-entrance-tide-times.rss| other - RSS feed URL for location"
store="1| store key - unique key for caching result"
force="| true - force loading from the feed"]bw_tides tideurl parameter
tideurl parameter for the bw_tides shortcode
