Updated the synchronisation tool

I updated the tool for displaying a video in sync with the log file. Now you can create a "clap" (the screen blinks for 1s) in order to easily get a time flag in the video and in the log file (added a message for that).

I updated the documentation here : https://wiki.paparazziuav.org/wiki/Video_replay#How_to_use_it
Why so many bindings to get the airframe ID ? If you only want the ID, you can bind to messages that starts with a numerical value (something like [0-9]+ ) and then anything ( .* ). But it is going to be a lot of messages in the end.
An other option is to bind to the PONG message.