Poison trivial update & stackable update

[Mitsune Foxfire]

Ngreth must have smuggled in a little patch for rogues lately, correcting the couple of PoP poisons that have not been learnable. That ogre is getting rogish lately, really

Well, here are the last missing poison trivials for the database:
- Itching Madness (with Dip Resist Sketch, http://www.eqtraders.com/items/show_...r=080080010000) .. trivial 231
- Scratching Madness (with Dip Resist Sketch, http://www.eqtraders.com/items/show_...r=080080010000) .. trivial 322
- Confusing Whisper (with Remiss Sketch, http://www.eqtraders.com/items/show_...r=080080010000) .. trivial 231
- Anger of Incapacitation (with Sluggish Sketch, http://www.eqtraders.com/items/show_...r=080080010000) .. trivial 231
- Rage of Incapacitation (with Sluggish Sketch, http://www.eqtraders.com/items/show_...r=080080010000) .. trivial 322
- Withering Flesh (with Vein Rot Sketch, http://www.eqtraders.com/items/show_...r=080080010000) .. trivial 231

Also, some items used for poisons can get better stacked now:
- drop of mercury up to 50
- golden ember powder up to 50
- plague mites up to 50
- dust of decay up to 100

[Verdandi]

All updated, thankee kindly!