Added Lightning Damage Support

Adds additional lightning damage to linked skill(s).

Gem Leveling

Level	Required Level	Required Intelligence	Added Lightning Damage	Experience to Level
1	15	22	1 - 9	28,130
2	18	26	1 - 10	47,943
3	21	30	1 - 12	77,012
4	24	33	1 - 15	118,383
5	27	37	1 - 17	175,816
6	30	40	1 - 20	254,061
7	33	44	1 - 23	359,090
8	36	48	1 - 27	703,128
9	40	52	2 - 32	755,049
10	43	56	2 - 37	1,426,490
11	47	61	2 - 44	1,488,645
12	49	63	3 - 48	1,964,019
13	52	67	3 - 54	2,573,731
14	54	69	3 - 58	3,351,223
15	55	70	3 - 61	9,930,867
16	56	72	3 - 63	21,335,597
17	57	73	3 - 66	50,672,586
18
19	59	75	4 - 71	146,997,023
20

Gem Quality

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