changing API to add the new object download into the getrecordings XML reply

...rs/org/bigbluebutton/web/controllers/ApiController.groovy

...vy/org/bigbluebutton/api/RecordingServiceHelperImp.groovy

...on-web/src/java/org/bigbluebutton/api/MeetingService.java

...n-web/src/java/org/bigbluebutton/api/domain/Download.java

...n-web/src/java/org/bigbluebutton/api/domain/Playback.java

...-web/src/java/org/bigbluebutton/api/domain/Recording.java

record-and-playback/mconf/scripts/mconf-uncript.rb