\r\n was shown in the warning messages of the admin panel log view page. They have
been removed. Additionally the messages.po file has been regenerated.
Tries to parse log lines and to display info in a table.
Additional JSON data is parsed and displayed clicking on a row.
File reading and line parsing is handled in iterators, to avoid to keep
too much data in memory.
Search and filter should be trivial to add.
Log file is read backward to display log events newest first.
A "tail" functionality should be easy to implement.
