Added Fire Damage Support

Adds fire damage to the linked skill(s).

Gem Levelling

Level	Required Level	Required Strength	Mana Cost Multiplier	% of Phys Damage Added as Fire Damage
1	15	22	130%	30%
2	18	26	130%	31%
3				32%
4				33%
5				34%
6				35%
7				36%
8				37%
9				38%
10				39%
11				40%
12	49	63	130%	41%
13				42%
14				43%
15	55	70	130%	44%
16
17
18
19
20

Gem Quality

Each percentage of quality adds X.