improved the client check so now it uses sip.js and bbb_webrtc_bridge_sip.js from the bigbluebutton-client, so it's going to be easier to maintain; included some new callbacks on bigbluebutton-client related to the websockets; just after the webrtc test, the connection is closed

using a bigger image for the download test; providing immediate feedback about the download speed for the user, with incremental changes; reduced the precision of the ping test; set the mail button to open the client e-mail on a blank page

renamed BBBClientCheck.html to index.html; moved the locale to outside the src directory (mxml warning)

cleanup; using a config.xml template, and added some logic in the build.xml to set config.xml with the proper host IP

a few tweaks on the client check page: build.xml downloads the image for the download speed test, config doesn't have someone's IP address (just like a config.xml.template), securityError on port check doesn't throw an exception anymore