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
added a script to generate a random file, that should be used later on the client check
Merge branch 'improving-client-checks' of github.com:mconf/bigbluebutton into improving-client-checks
Merge branch 'improving-client-checks' of github.com:mconf/bigbluebutton into improving-client-checks