Updated ignore list

Signed-off-by: Dasaan <mrloquax@googlemail.com>
Factions.data: Updated some of the plugin names to what look to be correct
ItemList.xlsx: Spreadsheet of item FormIDs and required plugins in preparation for inventory handling (WIP)
Items.data: The actual list of item FormIDs that OSE will use

Signed-off-by: Dasaan <mrloquax@googlemail.com>