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	28,130
2	18				47,943
3	21				77,012
4	24	33	-	1-15	118,383
5	27	37	140%	1-17	175,816
6	30				254,061
7	33				359,090
8	36				703,128
9	40				755,049
10	43				1,426,490
11	47				1,488,645
12	49	63	140%	3-48	1,964,019
13	52				2,573,731
14	54
15	55				9,930,867
16	56	72	140%	3-63	21,335,597
17
18
19
20

Gem Quality

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