Added voicebridge and dialnumber to ExternalApiCalls

bigbluebutton-client/src/org/bigbluebutton/core/UsersUtil.as

...nt/src/org/bigbluebutton/main/api/ExternalApiCallbacks.as

...client/src/org/bigbluebutton/main/api/ExternalApiCalls.as

...ient/src/org/bigbluebutton/main/model/users/Conference.as

...ent/src/org/bigbluebutton/main/model/users/JoinService.as

...ent/src/org/bigbluebutton/main/model/users/UserService.as

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