gitweb: Extra columns in blame
This patch adds extra columns to blame output, containing
line author and creation date. These columns are by default hidden by
display: none but by clicking on the expansion "button" you can display
them (and hide again). I think seeing this information without tooltips
fishing can give much better overview of the content evolution.
This patch depends on the interactive blame patch (but can be factored out;
the common required parts are just the blame.js infrastructure).
Signed-off-by: Petr Baudis <pasky@suse.cz>