[horde] Weather.com suggestion

[Chuck Hagenbuch]

Quoting RüdigerStark <mail at stark-online.info>:

> i just installed the Metar Weather and the WeatherDotCom block and i
> encountered a little problem. If pear Cache isn't insalled, the block
> doesn't display at all. No errormessage at all, no logfile notice.
> Nothing. Since the Cache package isn't a requirement for
> Services_Weather AND isn't listed on the test.php page from Horde, it
> took me 2 days to figure this out. I recomment to include PEAR Cache on
> the test.php page.

Ideally Services_Weather would ensure that it worked without Cache _or_ 
mark it as a dependency, but since we already check for the existance 
of Services/Weather.php in the block, I added a check for Cache.php as 
well.

-chuck

-- 
"But she goes not abroad in search of monsters to destroy." - John 
Quincy Adams