Update all significant feeds to be on a 1 minute expiration. Update double equals to triple equals.
Remove whitespace. Update comment.
Merge pull request #41 from ehunter-usgs/EQH-2926

Update expiration on significant feeds
Update Event implementation to be consistent with PDL
Add support for includesuperseded parameter, change includedelete to includedeleted
Add includesuperseded to api documentation page