add test HostInfo
remove unnecessary imports
Remove unnecessary imports and code
change the minimum version of java the hammer need : 1.5 -> 1.6
forgot to set the attributes to private
Add a CaptureDevice that read a rtpdump file containing RTP packet, and then
send the payload of these recorded packet (instead of generating media/ reading
a media source).

The RtpdumpFileReader has been tested an work correctly.
The DataSource is not completed yet (it's not correctly synchronized with the
rtp packet timestamp) -> TODO.