Please add a filter

I wish to import older feed items, but unfortunately your plugin blocks iportation of feed items older than 2 months.

I think the offending line is here on line 145:

https://github.com/PressForward/pressforward/blob/master/modules/rss-import/rss-import.php

Is it possible for you guys to add a filter so that i can override this without editing your plugin?