Add date/time to service-status check string.
Cache RSS feed results using global cache objects.

Adds an RSSCache object that can fetch, filter and cache RSS feed
entries. Created once on startup and used as a permanent global cache
for BBC news, Quotes of the Day and Word of the Day.
Add gitignore entry for IDE workspace settings.
Add some more animal names.
Keep news/weather together as screen size reduced.

Responsive layout now degrades to two cols when medium-sized resolution
is used, meaning that news/weather is a bit more readable. Quotes of the
day float underneath nicely, despite being in the same original row.
Only cache weather until the end of the hour.
Add worker threads checking for weather updates.
Log weather / location data errors.