Move the source files into the "src" directory instead of the root
Add the prefix "Open" before GL versions.
Fix: bad PHP function call.
Change font

* Reduce font size by default
* Set "sans-serif" by default
New: reads the commit log

Parse the file at "src/gl3_log.txt" to get the list of the last commits.
Fix: Display the right timezone offset.
Add the link to the log next to the last git update date.