Updated navigation "back" buttons to use good url hashes
instead of history.back()
Because once we have prev/next buttons on prez page, history
is not reliable anymore
no text overflow anymore on buttons (will fix mobile issue for buttons)
Overriding presentation "slot" by calculated slot name
displaying header with nav buttons on presentation page
updated voxxrdroid webview to enable remote debug
Logging sent request in /tmp/crawler.log