Fix ordering of fields for the list of authors.

commits_frac was used in date_first's place in f.write and, thus, completely
wrong in the resulting HTML report.

Signed-off-by: Heikki Hokkanen <hoxu@users.sf.net>

gitstats

 		f.write('<tr><th>Author</th><th>Commits (%)</th><th>+ lines</th><th>- lines</th><th>First commit</th><th>Last commit</th><th class="unsortable">Age</th><th>Active days</th><th># by commits</th></tr>')
 		for author in sorted(data.getAuthors()):
 			info = data.getAuthorInfo(author)
-			f.write('<tr><td>%s</td><td>%d (%.2f%%)</td><td>%d</td><td>%d</td><td>%s</td><td>%s</td><td>%s</td><td>%d</td><td>%d</td></tr>' % (author, info['commits'], info['lines_added'], info['lines_removed'], info['commits_frac'], info['date_first'], info['date_last'], info['timedelta'], info['active_days'], info['place_by_commits']))
+			f.write('<tr><td>%s</td><td>%d (%.2f%%)</td><td>%d</td><td>%d</td><td>%s</td><td>%s</td><td>%s</td><td>%d</td><td>%d</td></tr>' % (author, info['commits'], info['commits_frac'], info['lines_added'], info['lines_removed'], info['date_first'], info['date_last'], info['timedelta'], info['active_days'], info['place_by_commits']))
 		f.write('</table>')
 
 		# Authors :: Author of Month