add API to fetch recent logs (no tailing)
add API to fetch recent logs (no tailing)

XXX: doesn't work with `s curl` for some reason.

$ s curl --port 5722 --form "num: 4" get /v2/apps/$APPGUID/recent
Response Code:    Error 10000: Unknown request (404)
$

hpcloud/logyard-apps,hpcloud/logyard-apps,ActiveState/logyard-apps,ActiveState/logyard-apps