Add comment as to why conventional plugin triggers not used.

php/modules/Import.php

@@ -82,6 +82,9 @@ class Import extends Module {
 		$contains['photos']	= false;
 		$contains['albums']	= false;
 
+		# Invoke plugins directly, as instance method not valid here
+		# Note that updated albumId and path explicitly passed, rather
+		# than using func_get_args() which will only return original ones
 		$plugins->activate(__METHOD__ . ":before", array($albumID, $path));
 
 		# Get all files
@@ -135,6 +138,9 @@ class Import extends Module {
 
 		}
 
+		# Invoke plugins directly, as instance method not valid here
+		# Note that updated albumId and path explicitly passed, rather
+		# than using func_get_args() which will only return original ones
 		$plugins->activate(__METHOD__ . ":after", array($albumID, $path));
 
 		if ($contains['photos']===false&&$contains['albums']===false)	return 'Warning: Folder empty or no readable files to process!';