New skill in Oneiromancy - Medium.

When we released hardcore (announce 3331) we gave the Medium skill to Necromancy intending to mirror it to Oneiromancer at a later time after Psionics/Zealot was mirrored. Now that it has, there's the Oneiromancy counterpart!

Penned by my hand on Kinsday, the 12th of Haernos, in the year 504 MA.