Added Lightning Damage Support

Adds additional lightning damage to linked skill(s).

Gem Leveling

Level	Required Level	Required Intelligence	Mana Cost Multiplier	Added Lightning Damage	Experience to Level
1	15	22	-	1-9
2
3
4	24	33	-	1-15
5
6
7
8
9
10
11
12
13
14
15
16	56	72	140%	3-63
17
18
19
20

Gem Quality

Each percentage of quality adds +1% Shock duration on enemies.