Tests that the RAVE RSS feed is working and that a point-in-time example
can be translated into CAP XML.

Dereferencing the new operator is only 5.4 ready.

Implement RAVE RSS feed a source of proxied alerts

To be used for converting raw data into a CAP formatted file.

Customization should happen in the scripts.

Fetch alerts from twitter

add the `TwiterAlert` class.
Remove the old `WARNRSS` Class as it is no longer used.
Update the `RecentPubDateFilter` class to work with the TwiterAlert class (pub date variable name changes)

add `pear/HTTP_OAuth`
add `pear/Services_Twitter`