Temporal Devourers renamed Devourer and subtype changed to eldritch

Temporal Dredge renmed Dredge (subtype still temporal)
Worm that Walks and Devourers now have unique talents
Devourer hit points and damage improved (beware the land sharks!!)
Carrion Worms multiply less but have better resists
Epidemic now checks for disease immunity when spreading diseases
Dredge Frenzy improved a bit


git-svn-id: http://svn.net-core.org/repos/t-engine4@4271 51575b47-30f0-44d4-a5cc-537603b46e54