Do not consider a dot in path a filename extension.

'highlight.js/LICENSE' was recognized as 'js/LICENSE' extension erroneously.

Fixes SourceForge bug #3221520.

Thanks-to: Alexander Gladysh <agladysh@users.sourceforge.net>

gitstats

 				continue
 			parts = re.split('\s+', line, 4)
 			sha1 = parts[2]
-			filename = parts[3]
+			fullpath = parts[3]
 
+			filename = fullpath.split('/')[-1] # strip directories
 			if filename.find('.') == -1 or filename.rfind('.') == 0:
 				ext = ''
 			else: