Fix error causing save games to crash. Saves should be okay now

Cleanup & maintenance
Adjusted various values and trader chance for items
Organized some sorting of items/props in the menus
Altered all Gem names. Building III Gem ---> Building Gem III
Adjusted all gem crafting difficulty
Fixed crafting recipes on gems that required incorrect gems to reach next tier
Added new category for Special Potions
Removed the blank "Base" Potion
Large Potion props added.
All Potion props now placeable on tables
Removed references to Flowers
Added new Transmutation recipes for crystals. Can now convert 10/20/40/80 at a time. Based on Alchemy level
Crystal Converting moved to its own section in learning menu
Workbenches require Alchemy 2 instead of 0.

Restricted Gems Tier 2 - 5 from trader/trading

Alchemy Room Tier 1 - 4 available
Alchemy Storage Room Tier 1 - 2
Alchemy Building Tier 1 - 4

Check the Room and Building menus for details :)

New Large Potions
Potions now named by Small/Medium/Large

New Potion prop variations (More to come)

Balance pass
Values of gems reduced
Adjusted some values and stack sizes of other items
Alchemy room size requirement now 4, down from 6
Alchemy building/room prestige value
Alchemy tables reduced cost and max health
Various changes to crafting difficulties of items (Another pass on this later)

New
Active and Passive Alchemy II ability. Slight increase over Alchemy I abilities
Alchemy building tier 2, requires 2 tier 1 alchemy rooms
Alchemy & Gem Tables designs with faster load times (Thanks Plum!!)

Fixes
Restricted Death potion from traders and being traded
info description of alchemy abilities correctly reflect what they do