Add ability for the Ars Ecclesia to be placed on a Lectern

[SynfulChaot]

The Ars Ecclesia cannot be placed atop the vanilla Lectern. Having the ability to use the Ars Ecclesia from a Lectern, without needed to have it held in your inventory at all times, would be useful, especially now that there is a vanilla block that is designed for this exact purpose.

[MokahTGS]

+1 for this idea!